Power delivery device, AC adapter, AC charger, electronic apparatus and power delivery system, each capable of controlling output voltage value and available output current value

ABSTRACT

A PD device comprises: a DC/DC converter disposed between an input and a VBUS output; a primary-side controller configured to control an input current of the DC/DC converter; a secondary-side controller coupled to a plurality of control inputs, the secondary-side controller configured to executed a signal conversion of control input signals of the plurality of the control inputs, and configured to feedback the control input signals subjected to the signal conversion to the primary-side controller, wherein the primary-side controller varies an output voltage value and an available output current value (MAX value) of the DC/DC converter by controlling the input current of the DC/DC converter on the basis of the control input signal fed back from the secondary-side controller. The PD device is capable of switching with respect to the plurality of apparatuses and controlling the output voltage value and the available output current value (MAX value).

CROSS REFERENCE TO RELATED APPLICATIONS

This is a continuation application (CA) of PCT Application No. PCT/JP2016/052715, filed on Jan. 29, 2016, which claims priority to Japan Patent Application No. P2015-032985 filed on Feb. 23, 2015 and is based upon and claims the benefit of priority from prior Japanese Patent Applications No. P2015-032985 filed on Feb. 23, 2015 and PCT Application No. PCT/JP2016/052715, filed on Jan. 29, 2016, the entire contents of each of which are incorporated herein by reference.

FIELD

Embodiments described herein relate to a Power Delivery device (PD device), an Alternating-Current (AC) adapter, an AC charger, an electronic apparatus, and a Power Delivery system (PD system).

BACKGROUND

Conventionally, there have been provided Direct Current (DC) outlets which can intercommunicate between terminal devices and power line carrier communication networks supporting telecommunications standards with a Power Delivery (PD).

There are Power over Ethernet (PoE) technology and Universal Serial Bus (USB) technology as a Power Delivery technology (PD technology) using data lines.

As the USB technologies, there are USB 2.0 Standard up to maximum supply power of 2.5 W, USB 3.1 Standard up to maximum supply power of 4.5 W, and Battery Charging (BC) Revision 1.2 up to maximum supply power of 7.5 W according to the Power Delivery level (PD level).

Moreover, a USB Power Delivery (USB PD) Specification is compatible with existing cables and existing connectors, and coexists also with the USB 2.0 Standard, the USB 3.1 Standard, and the USB-BC Revision 1.2. In such a specification, values of the charging current and voltage is selectable within a range of voltage 5V-12V-20V and a range of current 1.5 A-2 A-3 A-5 A, and the USB electric charging and power transmission can be achieved to be 10 W, 18 W, 36 W, 65 W, and the maximum of 100 W.

DC/DC converters have been used as a power source for achieving such a PD. There are a diode rectification system and a synchronous rectification method in the DC/DC converters.

SUMMARY

The embodiments provide a PD device, an AC adapter, an AC charger, an electronic apparatus, and a PD system, each capable of switching with respect to a plurality of apparatuses, and each capable of controlling an output voltage value and an available output current value (MAX value).

According to one aspect of the embodiments, there is provided power delivery device comprising: a DC/DC converter disposed between an input and a VBUS output; a primary-side controller configured to control an input current of the DC/DC converter; and a secondary-side controller coupled to a plurality of control inputs, the secondary-side controller configured to executed a signal conversion of control input signals of the plurality of the control inputs, and configured to feed back the control input signals subjected to the signal conversion to the primary-side controller 30, wherein the primary-side controller varies an output voltage value and an available output current value of the DC/DC converter by controlling the input current on the basis of the control input signal fed back from the secondary-side controller.

According to another aspect of the embodiments, there is provided power delivery device comprising: a DC/DC converter disposed between an input and a VBUS output; a primary-side controller configured to control an input current of the DC/DC converter; a secondary-side controller coupled to a control input, the secondary-side controller configured to executed a signal conversion of a control input signal of the control input, and configured to feed back the control input signal subjected to the signal conversion to the primary-side controller; and an output capacitor configured to couple the secondary-side controller and the VBUS output to each other, wherein the primary-side controller varies an output voltage value and an available output current value of the DC/DC converter by controlling the input current on the basis of the control input signal fed back from the secondary-side controller.

According to a further aspect of the embodiments, there is provided an AC adapter comprising the above-mentioned power delivery device.

According to a still further aspect of the embodiments, there is provided an AC charger comprising the above-mentioned power delivery device.

According to a yet further aspect of the embodiments, there is provided an electronic apparatus comprising the above-mentioned power delivery device.

According to the embodiments, there can be provided the PD device, the AC adapter, the AC charger, the electronic apparatus, and the PD system, each capable of switching with respect to the plurality of the apparatuses, and each capable of controlling the output voltage value and the available output current value (MAX value).

BRIEF DESCRIPTION OF DRAWINGS

FIG. 1 is a schematic circuit block configuration diagram showing a PD device according to basic technology.

FIG. 2 is a schematic circuit block configuration diagram showing a PD device according to a first embodiment.

FIG. 3 is a schematic circuit block configuration diagram showing a PD device according to a modified example 1 of the first embodiment.

FIG. 4 is a schematic circuit block configuration diagram showing a PD device according to a modified example 2 of the first embodiment.

FIG. 5 is a schematic block configuration diagram showing a power output circuit applicable to the PD device according to the first embodiment.

FIG. 6 is a schematic circuit block configuration diagram showing a PD device according to a modified example 3 of the first embodiment.

FIG. 7 is a schematic circuit block configuration diagram showing a PD device according to a modified example 4 of the first embodiment.

FIG. 8 is a schematic circuit block configuration diagram showing a PD device according to a modified example 5 of the first embodiment.

FIG. 9A is a schematic diagram showing a relationship of an output voltage and an output current obtained using the PD device according to the first embodiment, which is an example of a rectangular shape showing a Constant Voltage Constant Current (CVCC).

FIG. 9B is a schematic diagram showing the relationship of the output voltage and the output current obtained using the PD device according to the first embodiment, which is an example of a fold-back shape of an inverted trapezium.

FIG. 9C is a schematic diagram showing the relationship of the output voltage and the output current obtained using the PD device according to the first embodiment, which is an example of a fold-back shape of an inverted triangle.

FIG. 9D is a schematic diagram showing the relationship of the output voltage and the output current obtained using the PD device according to the first embodiment, which is an example of a trapezoidal shape.

FIG. 9E is a schematic diagram showing the relationship of the output voltage and the output current obtained using the PD device according to the first embodiment, which is an example of a pentagon shape.

FIG. 10 is a schematic block configuration diagram showing a secondary-side controller applicable to the PD device according to the first embodiment.

FIG. 11 is a schematic block configuration diagram showing the secondary-side controller also including a connecting relationship to an output (VBUS) line.

FIG. 12 is a schematic block configuration diagram showing a secondary-side controller (configuration example 1) applicable to the PD device according to the first embodiment.

FIG. 13 is a schematic block configuration diagram showing a secondary-side controller (configuration example 2) applicable to the PD device according to the first embodiment.

FIG. 14 is a schematic block configuration diagram showing a secondary-side controller (configuration example 3) applicable to the PD device according to the first embodiment.

FIG. 15 is a schematic block configuration diagram showing a secondary-side controller (configuration example 4) applicable to the PD device according to the first embodiment.

FIG. 16 is a schematic block configuration diagram showing a secondary-side controller (configuration example 5) applicable to the PD device according to the first embodiment.

FIG. 17 is a schematic block configuration diagram showing a secondary-side controller (configuration example 6) applicable to the PD device according to the first embodiment.

FIG. 18 is a schematic block configuration diagram showing a secondary-side controller (configuration example 7) applicable to the PD device according to the first embodiment.

FIG. 19 is a schematic block configuration diagram showing a secondary-side controller and a power output circuit applicable to the PD device according to the first embodiment.

FIG. 20 is a schematic block configuration diagram showing a secondary-side controller (configuration example 8) applicable to the PD device according to the first embodiment.

FIG. 21 is a schematic block configuration diagram showing a secondary-side controller and a power output circuit (configuration example 9) applicable to the PD device according to the first embodiment.

FIG. 22A shows a configuration example of a port selector shown in FIG. 21.

FIG. 22B shows another configuration example of the port selector shown in FIG. 21.

FIG. 23 is a schematic block configuration diagram showing a secondary-side controller (configuration example 10) applicable to the PD device according to the first embodiment.

FIG. 24 is a schematic configuration diagram showing an aspect of connecting between the PD devices according to the first embodiment through receptacles.

FIG. 25 is a schematic configuration diagram showing the inside of the receptacle applicable to the PD device according to the first embodiment.

FIG. 26 is a schematic configuration diagram showing an aspect of connecting between the PD devices according to the first embodiment through receptacles and plugs.

FIG. 27A is a schematic configuration diagram showing an aspect of connecting between the PD devices according to the first embodiment through receptacles and a plug cable.

FIG. 27B is a diagram showing a connecting relationship between the two receptacles.

FIG. 28A is a schematic block configuration diagram for explaining a connecting relationship between a power output circuit applicable to the PD device according to the first embodiment, and a power input circuit.

FIG. 28B is a schematic circuit configuration diagram corresponding to the configuration shown in FIG. 28A.

FIG. 29A shows a specific circuit configuration example of the power output circuit shown in FIG. 28B.

FIG. 29B is a configuration diagram showing a bidirectional switch applicable to the configuration shown in FIG. 29A.

FIG. 30 is a schematic circuit configuration diagram showing the power output circuit (configuration example 1) applicable to the PD device according to the first embodiment.

FIG. 31 is a schematic circuit configuration diagram showing the power output circuit (configuration example 2) applicable to the PD device according to the first embodiment.

FIG. 32 is a schematic circuit configuration diagram showing the power output circuit (configuration example 3) applicable to the PD device according to the first embodiment.

FIG. 33 is a schematic circuit configuration diagram showing the power output circuit (configuration example 4) applicable to the PD device according to the first embodiment.

FIG. 34A is a schematic circuit block configuration diagram showing a secondary-side controller applied to the PD device according to the first embodiment.

FIG. 34B is another schematic circuit block configuration diagram showing the secondary-side controller applied to the PD device according to the first embodiment.

FIG. 35 is a schematic circuit block configuration diagram showing a PD device according to a modified example 6 of the first embodiment.

FIG. 36 is a schematic circuit block configuration diagram showing a PD device according to a modified example 7 of the first embodiment.

FIG. 37 is a schematic circuit block configuration diagram showing a PD device according to a modified example 8 of the first embodiment.

FIG. 38 is a schematic circuit block configuration diagram showing a PD device according to a second embodiment.

FIG. 39 is a schematic circuit block configuration diagram showing a PD device according to a third embodiment.

FIG. 40 is a schematic circuit block configuration diagram showing a PD device according to a fourth embodiment.

FIG. 41 is a schematic circuit block configuration diagram showing a PD device according to a fifth embodiment.

FIG. 42 is a schematic circuit block configuration diagram showing a PD device according to a sixth embodiment.

FIG. 43 is a schematic circuit block configuration diagram showing a PD device according to a seventh embodiment.

FIG. 44 is a schematic circuit block configuration diagram showing a metal oxide semiconductor (MOS) switch applied to the PD device according to the embodiments.

FIG. 45A shows an example of connecting a USB PD and the PD device (PD) according to the embodiments in an AC adapter/AC charger with external plugs, in an example of wire connection for connecting the AC adapter/AC charger to a plug capable of being connected to an outlet, using a cable.

FIG. 45B shows another example of connecting the USB PD and the PD device (PD) according to the embodiments in the AC adapter/AC charger with external plugs, in the example of wire connection for connecting the AC adapter/AC charger to the plug capable of being connected to the outlet, using the cable.

FIG. 46A shows an example of including the USB PD and the PD device (PD) according to the embodiments in the AC adapter/AC charger, in an example of containing a plug capable of being connected to the outlet in the AC adapter/AC charger.

FIG. 46B shows an example of connecting receptacles contained in the AC adapter/AC charger to the external plugs, in the example of containing the plug capable of being connected to the outlet in the AC adapter/AC charger.

FIG. 47A shows an example of connecting the PD in an AC adapter/AC charger to an external plug, in an example of wire connection for connecting the AC adapter/AC charger to a plug capable of being connected to an outlet using a cable.

FIG. 47B shows an example of including a receptacle in the AC adapter/AC charger, in the example of wire connection for connecting the AC adapter/AC charger to the plug capable of being connected to the outlet using the cable.

FIG. 47C shows an example of connecting a plug contained in the AC adapter/AC charger to the external plug, in the example of wire connection for connecting the AC adapter/AC charger to the plug capable of being connected to the outlet using the cable.

FIG. 48A shows an example of connecting the PD in the AC adapter/AC charger to the external plug, in an example of wire connection for connecting the AC adapter/AC charger to the plug capable of being connected to the outlet using a USB PD cable.

FIG. 48B shows an example of including a receptacle in the AC adapter/AC charger, in the example of wire connection for connecting the AC adapter/AC charger to the plug capable of being connected to the outlet using the USB PD cable.

FIG. 48C shows an example of connecting a plug contained in the AC adapter/AC charger to the external plug, in the example of wire connection for connecting the AC adapter/AC charger to the plug capable of being connected to the outlet using the USB PD cable.

FIG. 49A shows an example of connecting the PD in the AC adapter/AC charger to the external plug, in an example of containing the plug capable of being connected to the outlet in the AC adapter/AC charger.

FIG. 49B shows an example of including the receptacle in the AC adapter/AC charger, in the example of containing the plug capable of being connected to the outlet in the AC adapter/AC charger.

FIG. 49C shows an example of connecting the plug contained in the AC adapter/AC charger to the external plugs, in the example of containing the plug capable of being connected to the outlet in the AC adapter/AC charger.

FIG. 50A shows an example of respectively connecting a plurality of the PDs in the AC adapter/AC charger to a plurality of the external plugs, in an example of containing the plug capable of being connected to the outlet in the AC adapter/AC charger.

FIG. 50B shows an example of including a plurality of the receptacles in the AC adapter/AC charger, in the example of containing the plug capable of being connected to the outlet in the AC adapter/AC charger.

FIG. 50C shows an example of respectively connecting a plurality of the plugs contained in the AC adapter/AC charger to a plurality of the external plugs, in the example of containing the plug capable of being connected to the outlet in the AC adapter/AC charger.

FIG. 51A shows in particular an example of including a plurality of internal circuits containing the USB PD device therein in an electronic apparatus, having a plurality of signals using the USB PD, in an example of wire connection for connecting the electronic apparatus to the plug capable of being connected to the outlet using the cable.

FIG. 51B shows the example of wire connection in which the electronic apparatus is connected to the plug connectable to the outlet using the cable, and shows in particular an example in which the plug connectable to the outlet is included in the electronic apparatus, the plurality of the internal circuits which include the USB PD therein are included in the electronic apparatus, having the plurality of the signals using the USB PD.

FIG. 52A shows in particular an example of including the USB PD connected to the outside in one internal circuit, in an example in which the plug capable of being connected to the outlet is included in the electronic apparatus, and the plurality of the internal circuits containing the USB PD device therein are included in the electronic apparatus, having the plurality of the signals using the USB PD device.

FIG. 52B shows in particular an example of including a plurality of the USB PD devices connected to the outside in one internal circuit, in the example in which the plug capable of being connected to the outlet is included in the electronic apparatus, the plurality of the internal circuits containing the USB PD device therein are included in the electronic apparatus, having the plurality of the signals using the USB PD device.

FIG. 53A is an explanatory diagram of a protection function of the USB PD device according to the embodiments in the case where a smartphone is used as a connecting target.

FIG. 53B is an explanatory diagram of a protection function of the USB PD device according to the embodiments in the case where a laptop PC is used as a connecting target.

FIG. 54 shows a schematic bird's-eye view structure example of a PD device, in which a receptacle is mounted, according to the embodiments, applicable to the AC adapter, the AC charger, and the electronic apparatus.

FIG. 55 shows a schematic bird's-eye view structure example of a PD device, in which a receptacle is mounted, according to the embodiments, applicable to the AC adapter, the AC charger, and the electronic apparatus.

FIG. 56 shows a schematic bird's-eye view structure example of a PD device, in which a plurality of receptacles are mounted, according to the embodiments, applicable to the AC adapter, the AC charger, and the electronic apparatus.

FIG. 57 shows a schematic bird's-eye view structure example of a PD device, in which a plug is mounted, according to the embodiments, applicable to the AC adapter, the AC charger, and the electronic apparatus.

FIG. 58 is a schematic circuit block configuration diagram showing the PD device according to the embodiments connected to a plurality of connecting targets through a plurality of the receptacles.

FIG. 59 shows a schematic bird's-eye view structure example of a PD device, in which a plurality of receptacles and a switch are mounted, according to the embodiments, applicable to the AC adapter, the AC charger, and the electronic apparatus.

FIG. 60 is a schematic circuit block configuration diagram for explaining an example of using control input output signals for a USB-PD communication between a plurality of the PD devices according to the embodiments.

FIG. 61 is a schematic block configuration diagram for explaining the data communications and the PD between two PCs, in the PD system to which the PD device according to the embodiments can be applied.

FIG. 62A is a schematic block configuration diagram for explaining the data communications and the power delivery between two units, in the PD system to which the PD device according to the embodiments can be applied.

FIG. 62B is a schematic block configuration diagram showing a PD system including an AC adapter and a smartphone each containing the PD device according to the embodiments.

FIG. 63 is a schematic block configuration diagram of a PD system including two units each containing the PD device according to the embodiments.

FIG. 64 is another schematic block configuration diagram showing a PD system, to which the PD device according to the embodiments can be applied, including two units different from those in FIG. 35.

FIG. 65 is a schematic block configuration diagram showing a first PD system to which the PD device according to the embodiments can be applied.

FIG. 66 is a schematic block configuration diagram showing a second PD system to which the PD device according to the embodiments can be applied.

FIG. 67 is a schematic block configuration diagram showing a third PD system to which the PD device according to the embodiments can be applied.

FIG. 68 is a schematic block configuration diagram showing a fourth PD system to which the PD device according to the embodiments can be applied.

FIG. 69 is a schematic block configuration diagram showing a configuration in which a controller and a signal conversion circuit are contained in a CPU interface, in the PD system to which the PD device according to the embodiments can be applied.

DESCRIPTION OF EMBODIMENTS

Next, certain embodiments will now be described with reference to drawings. In the description of the following drawings, the identical or similar reference numeral is attached to the identical or similar part. However, it should be noted that the drawings are schematic and therefore the relation between thickness and the plane size and the ratio of the thickness differs from an actual thing. Therefore, detailed thickness and size should be determined in consideration of the following explanation.

Moreover, the embodiments shown hereinafter exemplify the apparatus and method for materializing the technical idea; and the embodiments does not specify the material, shape, structure, placement, etc. of each component part as the following. The embodiments may be changed without departing from the spirit or scope of claims.

[Basic Technology]

As shown in FIG. 1, a PD device 4A according to a basic technology includes: a DC/DC converter 13 disposed between an input and an output, DC/DC converter 13 including a transformer 15, a diode D1, a capacitor C1, and a MOS transistor Q1 and a resistor RS connected in series between a primary-side inductance L1 of the transformer 15 and a ground potential; a primary-side controller 30 configured to control the MOS transistor Q1; a power source supply circuit 10 connected between the input and the primary-side controller 30, the power source supply circuit 10 configured to supply a power source to the primary-side controller 30; a secondary-side controller 16 connected to the output, the secondary-side controller 16 capable of controlling an output voltage V_(o) and an output current I_(o); an error amplifier 21 for error compensation connected to an output of the DC/DC converter 13 and the secondary-side controller 16; and an insulation circuit 20 connected to the error amplifier 21, the insulation circuit 20 configured to feedback output information to the primary-side controller 30.

Moreover, the secondary-side controller 16 may be connected to the output (VBUS) through an AC coupling capacitor.

Moreover, as shown in FIG. 1, the PD device 4A according to the basic technology includes: a switch SW configured to interrupt the output of the DC/DC converter 13 and the power line output (VBUS); and a filter circuit (L_(F), C_(F)) disposed between the switch SW and the power line output (VBUS). ON/OFF control for the switch SW can be executed by the secondary-side controller 16.

An AC signal is superimposed to be input into the power line output (VBUS) from an outside, in the PD device 4A according to the basic technology.

In the PD device 4A according to the basic technology, the control input signal is input into the secondary-side controller 16 from the power line output (VBUS), and electric power information at the output side is fed back to the primary-side controller 30 through the error amplifier 21 and the insulation circuit 20. The primary-side controller 30 controls ON/OFF of the MOS transistor Q1, thereby stabilizing the output voltage.

Moreover, in the PD device 4A according to the basic technology, an amount of current conducted to the primary-side inductance L1 is detected by the current sensing resistor RS, and an amount of current, e.g. a primary-side overcurrent, is controlled in the primary-side controller 30. As a consequence, the PD device 4A according to the basic technology has a variable function of an output voltage value and available output current value (MAX value).

In the PD device 4A according to the basic technology, the variable function of the output voltage value and the available output current value (MAX value) of the step-down (buck) type DC/DC converter 13 is realized by the feedback control from the secondary-side controller 16 to the primary-side controller 30. Accordingly, a relationship between the output voltage V_(o) and the output currents I_(o) can be varied (variable function) in accordance with loads (e.g., smartphones, laptop PCs, tablet PCs, etc.) connected to the output.

The inductance L_(F) formed with a filter coil at the output side is a separating inductance. More specifically, the filter circuit including the inductance L_(F) and the capacitor C_(F) separates a control signal from the DC/DC converter in order that the control input signal from the output is not input into the DC/DC converter 13.

First Embodiment

FIG. 2 shows a schematic circuit block configuration of a PD device according to a first embodiment.

As shown in FIG. 2, a PD device 4 according to the first embodiment includes: a DC/DC converter 13 disposed between an input and a VBUS output; a primary-side controller 30 configured to control an input current of the DC/DC converter 13; a secondary-side controller 16 coupled to a control input, the secondary-side controller 16 configured to executed a signal conversion of a control input signal of the control input, and configured to feed back the control input signal subjected to the signal conversion to the primary-side controller 30; and an output capacitor C_(o) configured to couple the secondary-side controller 16 and the VBUS output to each other. In this context, the primary-side controller 30 varies an output voltage value and an available output current value (MAX value) of the DC/DC converter 13 by controlling the input current of the DC/DC converter 13 on the basis of the control input signal fed back from the secondary-side controller 16.

Moreover, the PD device 4 according to the first embodiment may include a coupling capacitor C_(c) configured to couple the secondary-side controller 16 and the control input to each other, as shown in FIG. 2. Alternatively, the secondary-side controller 16 and the control input may be directly coupled to each other, without through the coupling capacitor C_(c).

The secondary-side controller 16 can further execute signal conversion and switching of an AC signal component of the VBUS output. The AC signal component of the VBUS output is coupled to the secondary-side controller 16 through the output capacitor C_(o) connected between the VBUS output and the secondary-side controller 16.

Moreover, as shown in FIG. 2, the PD device 4 according to the first embodiment may include a control terminal CT, and the control input may be coupled to the control terminal CT. Moreover, a control output signal of the PD device 4 according to the first embodiment can be output to an external apparatus through the control terminal CT.

Moreover, the control output signal of the PD device 4 according to the first embodiment can be output to the external apparatus also through the output capacitor C_(o), in the PD device 4 according to the first embodiment.

Moreover, the DC/DC converter 13 includes a diode rectification type converter, in the PD device 4 according to the fifth embodiment.

In the PD device 4 according to the first embodiment, the DC/DC converter 13 includes: a transformer 15; a first MOS transistor Q1 and a current sensing resistor RS each connected in series between the primary-side inductance L1 of the transformer 15 and ground potential; a diode D1 connected between the secondary-side inductance L2 of the transformer 15 and the VBUS output; and a first capacitor C1 connected between the VBUS output and the ground potential.

In the PD device 4 according to the first embodiment, the secondary-side controller 16 can execute a frequency conversion, a direct current (DC) level conversion, or an amplitude level conversion, for example.

Moreover, as shown in FIG. 2, the PD device 4 according to the first embodiment may include the insulation circuit 20 connected to the secondary-side controller 16, the insulation circuit 20 configured to feed back the control input signal to the primary-side controller 30. A capacitor, a photo coupler, a transformer, etc. is applicable to the insulation circuit 20. Moreover, as usage, a bidirectional transformer having an insulated driver, a bilateral device, etc. may also be applied thereto.

Moreover, as shown in FIG. 2, the PD device 4 according to the first embodiment may include the error amplifier for error compensation connected to the secondary-side controller 16, the error amplifier 21 configured to feed back the control input signal to the insulation circuit 20. The error amplifier 21 is controlled by the secondary-side controller 16 and can execute an error compensation of the control input signal to be fed back to the insulation circuit 20.

Moreover, as shown in FIG. 2, the PD device 4 according to the first embodiment may includes: a switch SW configured to interrupt the output of the DC/DC converter 13 and the VBUS output; and a filter circuit (L_(F), C_(F)) disposed between the switch SW and the VBUS output.

The output of the DC/DC converter 13 and the power line output (VBUS) can be interrupted by the switch SW. ON/OFF control for the switch SW can be executed by the secondary-side controller 16. The switch SW may include a Metal Oxide Semiconductor Field Effect Transistor (MOSFET).

The inductance L_(F) formed with a filter coil at the output side is a separating inductance. More specifically, the filter circuit including the inductance L_(F) and the capacitor C_(F) separates a control signal from the DC/DC converter in order that the control input signal from the output is not input into the DC/DC converter 13.

Moreover, as shown in FIG. 2, the PD device 4 according to the first embodiment may include a power source supply circuit 10 connected between an input of the DC/DC converter 13 and the primary-side controller 30, the power source supply circuit 10 configured to supply electric power to the primary-side controller 30.

In the PD device 4 according to the first embodiment, the variable function of the output voltage value and the available output current value (MAX value) of the step-down (buck) type DC/DC converter 13 is realized by the feedback control from the secondary-side controller 16 to the primary-side controller 30. Accordingly, a relationship between the output voltage V_(o) and the output currents I_(o) can be varied (variable function) in accordance with loads (e.g., smartphones, laptop PCs, tablet PCs, etc.) connected to the output.

Modified Example 1

FIG. 3 shows a schematic circuit block configuration of a PD device according to a modified example 1 of the first embodiment.

As shown in FIG. 3, the PD device 4 according to the modified example 1 of the first embodiment includes: a DC/DC converter 13 disposed between an input and a VBUS output; a primary-side controller 30 configured to control an input current of the DC/DC converter 13; and a secondary-side controller 16 coupled to a plurality of control inputs, the secondary-side controller 16 configured to executed a signal conversion of control input signals of the plurality of the control inputs, and configured to feed back the control input signals subjected to the signal conversion to the primary-side controller 30. In this context, the primary-side controller 30 varies an output voltage value and an available output current value (MAX value) of the DC/DC converter 13 by controlling the input current on the basis of the control input signals fed back from the secondary-side controller 16.

Moreover, the PD device 4 according to the modified example 1 of the first embodiment may include an output capacitor C_(o) configured to couple the secondary-side controller 16 and the VBUS output to each other, as shown in FIG. 3.

The secondary-side controller 16 can further execute signal conversion and switching of an AC signal component of the VBUS output. The AC signal component of the VBUS output is coupled to the secondary-side controller 16 through the output capacitor C_(o) connected between the VBUS output and the secondary-side controller 16.

Moreover, as shown in FIG. 3, the PD device 4 according to the modified example 1 of the first embodiment may include a plurality of control terminals CT1, CT2, . . . , CTn, and the plurality of the control inputs may be respectively coupled to the plurality of the controls terminals CT1, CT2, . . . , CTn. Moreover, the respective control output signals of the PD device 4 according to the modified example 1 of the first embodiment can be output to external apparatuses through the plurality of the respective control terminals CT1, CT2, . . . , CTn. The PD device 4 according to the modified example 1 of the first embodiment may include a coupling capacitor C_(c) configured to couple the plurality of the control terminals CT1, CT2, . . . , CTn and the secondary-side controllers 16, in the same manner as FIG. 2. Alternatively, the secondary-side controller 16 and the plurality of the control inputs may be directly coupled to each other, without through the coupling capacitor C_(c).

Moreover, the control output signal of the PD device 4 according to the modified example 1 of the first embodiment can be output to the external apparatus also through the output capacitor C_(o), in the PD device 4 according to the first embodiment.

Moreover, as shown in FIG. 2, the PD device 4 according to the modified example 1 of the first embodiment may includes: a switch SW configured to interrupt the output of the DC/DC converter 13 and the VBUS output; and a filter circuit (L_(F), C_(F)) disposed between the switch SW and the VBUS output.

In the PD device 4 according to the modified example 1 of the first embodiment, when the output capacitor C_(o) configured to couple the secondary-side controller 16 and the VBUS output to each other is not applied thereto, the inductance L_(F) may be omitted therefrom. Other configurations are the same as those of the first embodiment.

Modified Example 2

FIG. 4 shows a schematic circuit block configuration of a PD device according to a modified example 2 of the first embodiment.

As shown in FIG. 4, the PD device 4 according to the modified example 2 of the first embodiment includes a power output circuit 130 connected to the primary-side controller 30, the power output circuit 130 configured to supply output voltages to a plurality of VBUS outputs disposed in pairs with the plurality of the control inputs.

The power output circuit 130 may include a plurality of DC/DC converters 13 ₁, 13 ₂, . . . , 13 _(n), as shown in FIG. 5.

Moreover, as shown in FIG. 4, the PD device 4 according to the modified example 2 of the first embodiment includes a plurality of VBUS power output terminals PT1, PT2, . . . , PTn, and the power output circuit 130 can supply the output voltages through the plurality of the VBUS power output terminals PT1, PT2, . . . , PTn.

Moreover, the PD device 4 according to the modified example 2 of the first embodiment may include AC coupling capacitors (not shown) coupled to the plurality of the control inputs, and the secondary-side controller 16 may be coupled to the plurality of the control inputs respectively through the AC coupling capacitors.

Moreover, the plurality of the control inputs may be directly connected to the secondary-side controller 16. More specifically, the control input signals of the plurality of the control inputs may be directly input to the secondary-side controller 16 without through the AC coupling capacitors, as shown in FIG. 4. Other configurations are the same as those of the first embodiment.

Modified Example 3

FIG. 6 shows a schematic circuit block configuration of a PD device according to a modified example 3 of the first embodiment.

As shown in FIG. 6, the PD device 4 according to the modified example 3 of the first embodiment includes: a DC/DC converter 13 ₀ disposed between an input and a VBUS output; a primary-side controller 30 configured to control an input current of the DC/DC converter 13 ₀; and a secondary-side controller 16 coupled to a plurality of control inputs, the secondary-side controller 16 configured to executed a signal conversion of control input signals of the plurality of the control inputs, and configured to feed back the control input signals subjected to the signal conversion to the primary-side controller 30. In this context, the primary-side controller 30 varies an output voltage value and an available output current value (MAX value) of the DC/DC converter 13 ₀ by controlling the input current on the basis of the control input signals fed back from the secondary-side controller 16. In FIG. 6, an illustration of an error amplifier (EA) 21 and an insulation circuit 20 is omitted.

Moreover, the PD device 4 according to the modified example 3 of the first embodiment may include an output capacitor C_(o) configured to couple the secondary-side controller 16 and the VBUS output to each other, as shown in FIG. 6.

Furthermore, as shown in FIG. 6, the PD device 4 according to the modified example 3 of the first embodiment includes a power output circuit 130 connected to the primary-side controller 30, the power output circuit 130 configured to supply output voltages to a plurality of VBUS outputs disposed in pairs with the plurality of the control inputs.

The power output circuit 130 includes a plurality of DC/DC converters 13 ₁, 13 ₂, . . . , 13 _(n), as shown in FIG. 6. The primary-side controller varies an output voltage value and an available output current value (MAX value) of the DC/DC converters 13 ₁, 13 ₂, . . . , 13 _(n) in addition to the DC/DC converter 13 ₀ by controlling the input current on the basis of the control input signals fed back from the secondary-side controller 16.

Moreover, as shown in FIG. 6, the PD device 4 according to the modified example 3 of the first embodiment includes a plurality of VBUS power output terminals PT1, PT2, . . . , PTn, and the power output circuit 130 can supply the output voltages through the plurality of the VBUS power output terminals PT1, PT2, . . . , PTn.

Moreover, the PD device 4 according to the modified example 3 of the first embodiment may include AC coupling capacitors (not shown) coupled to the plurality of the control inputs, and the secondary-side controller 16 may be coupled to the plurality of the control inputs respectively through the AC coupling capacitors.

Moreover, the plurality of the control inputs may be directly connected to the secondary-side controller 16. More specifically, the control input signals of the plurality of the control inputs may be directly input to the secondary-side controller 16 without through the AC coupling capacitors, as shown in FIG. 6. Other configurations are the same as those of the first embodiment.

MODIFIED EXAMPLE 4

FIG. 7 shows a schematic circuit block configuration of a PD device according to a modified example 4 of the first embodiment. FIG. 7 is a diagram of implementing the secondary-side controller 16 in the PD device according to the modified example 3 of the first embodiment shown in FIG. 6.

More specifically, as shown in FIGS. 6 and 7, the PD device 4 according to the modified example 4 of the first embodiment includes: a DC/DC converter 13 ₀ disposed between an input and a VBUS output; a primary-side controller 30 configured to control an input current of the DC/DC converter 13 ₀; and a secondary-side controller 16 coupled to a plurality of control inputs, the secondary-side controller 16 configured to executed a signal conversion of control input signals of the plurality of the control inputs, and configured to feed back the control input signals subjected to the signal conversion to the primary-side controller 30. In this context, the primary-side controller 30 varies an output voltage value and an available output current value (MAX value) of the DC/DC converter 13 ₀ by controlling the input current on the basis of the control input signals fed back from the secondary-side controller 16.

Moreover, the PD device 4 according to the modified example 4 of the first embodiment may include an output capacitor C_(o) configured to couple the secondary-side controller 16 and the VBUS output to each other, as shown in FIG. 7.

In this context, the secondary-side controller includes a first communication circuit 18 configured to execute a frequency conversion, and a second communication circuit 19 configured to execute a code conversion, as shown in FIG. 7.

The output capacitor C_(o) may be connected between the first communication circuit 18 and the VBUS output, as shown in FIG. 7.

Furthermore, as shown in FIG. 7, the PD device 4 according to the modified example 4 of the first embodiment includes a power output circuit 130 connected to the primary-side controller 30, the power output circuit 130 configured to supply output voltages to a plurality of VBUS outputs disposed in pairs with the plurality of the control inputs.

As shown in FIGS. 6 and 7, the power output circuit 130 includes a plurality of DC/DC converters 13 ₁, 13 ₂, . . . , 13 _(n), and the primary-side controller varies an output voltage value and an available output current value (MAX value) of the DC/DC converters 13 ₁, 13 ₂, . . . , 13 _(n) in addition to the DC/DC converter 13 ₀ by controlling the input current on the basis of the control input signals fed back from the secondary-side controller 16.

Moreover, as shown in FIGS. 6 and 7, the PD device 4 according to the modified example 4 of the first embodiment includes a plurality of VBUS power output terminals PT1, PT2, . . . , PTn, and the power output circuit 130 can supply the output voltages through the plurality of the VBUS power output terminals PT1 (VBUS1), PT2 (VBUS2), . . . , PTn (VBUSn). Other configurations are the same as those of the modified example 3 of the first embodiment.

MODIFIED EXAMPLE 5

FIG. 8 shows a schematic circuit block configuration of a PD device according to a modified example 5 of the first embodiment. FIG. 8 shows a block configuration of a diode rectification type DC/DC converter 13 applied to the PD device according to the modified example 1 of the first embodiment shown in FIG. 3. A type of the DC/DC converter 13 is not limited to such a diode rectification type, but can also be a synchronous rectification type. Moreover, a boosting type or a step-down (buck) type DC/DC converter 13 can also be applied thereto. Other configurations are the same as those of the modified example 1 of the first embodiment.

As the relationship between the output voltage V_(o) and the output current I_(o) obtained by using the PD device 4 according to the first embodiment, there can be adopted various shape, e.g. a rectangular shape as shown in FIG. 9A, a fold-back shape of inverted trapezium as shown in FIG. 9B, a fold-back shape of inverted triangle as shown in FIG. 9C, a trapezoidal shape as shown in FIG. 9D, and a pentagonal shape as shown in FIG. 9E. For example, the rectangular shape shown in FIG. 9A is an example of Constant Voltage Constant Current (CVCC).

In addition, in the PD device 4 according to the first embodiment, another output capacitor C_(o) for extracting the AC signals superimposed to be input into the power line output (VBUS) from an outside may be connected between the secondary-side controller 16 and the power line output (VBUS). However, in such a case, the separating inductance L_(F) will be required therefor. More specifically, since it is required to separate the control input signal from the power line output (VBUS) in order that the control input signal is not input into the DC/DC converter 13, there will be required a filter circuit including the inductance L_(F) and the capacitor C_(F). On the other hand, if the output capacitor C_(o) is not applied in the PD device 4 according to the first embodiment, such a separating inductance L_(F) becomes unnecessary.

(Configuration of Secondary-Side Controller)

FIG. 10 shows a schematic block configuration of the secondary-side controller 16 applicable to the PD device according to the first embodiment. Moreover, FIG. 11 shows a schematic block configuration of the secondary-side controller also including a connecting relationship to an output (VBUS) line.

As shown in FIG. 10, in the PD device according to the first embodiment, the secondary-side controller 16 may includes: a protocol conversion unit 18 connected to an error amplifier (EA) 21, the protocol conversion unit 18 configured to execute a frequency conversion; and a communication circuit 19 disposed between the protocol conversion unit 18 and the control input, the communication circuit 19 configured to execute a code conversion.

Moreover, the output capacitor C_(o) may be connected between the protocol conversion unit 18 and the VBUS output, in the PD device according to the first embodiment, as shown in FIG. 11.

In the PD device according to the first embodiment, the control inputs in the plurality of the control terminals CT1, CT2, . . . , CTn are subjected to a coding modulation (code conversion) in the communication circuit 19, and also are subjected to the frequency conversion from a frequency f1 to a frequency f2 in the protocol conversion unit 18, and then are input into the error amplifier (EA) 21.

Moreover, the respective control output signals of the PD device 4 according to the first embodiment can be output to external apparatuses through the plurality of the respective control terminals CT1, CT2, . . . , CTn. More specifically, the control signals from the primary-side controller 30 are also subjected to the frequency conversion from the frequency f2 to the frequency f1 in the protocol conversion unit 18, and are also subjected to the coding modulation in the communication circuit 19, and then can be output to the plurality of the control terminals CT1, CT2, . . . , CTn.

Moreover, the AC signal components superimposed on the VBUS output are subjected to the frequency conversion from the frequency f1 to the frequency f2 through the output capacitor C_(o) in the protocol conversion unit 18, and are subjected to the coding modulation in the communication circuit 19, and then are input into the error amplifier (EA) 21. Moreover, the control signals from the primary-side controller 30 are also subjected to the frequency conversion from the frequency f2 to the frequency f1 in the protocol conversion unit 18, and are also subjected to the coding modulation in the communication circuit 19, and then can be output to the VBUS output through the output capacitor C_(o). Thus, a control output signal of the PD device 4 according to the first embodiment can be output to an external apparatus also through the VBUS output.

Configuration Example 1

FIG. 12 shows a schematic block configuration example 1 of the secondary-side controller 16S applicable to the PD device according to the first embodiment.

In the PD device according to the first embodiment, the secondary-side controller 16S may include a switch (S1, T0, T1) connected to an error amplifier (EA) 21, the switch (S1, T0, T1) configured to select (switch) between the output capacitor C_(o) and the control input supplied into the control terminal CT, as shown in FIG. 12.

Configuration Example 2

FIG. 13 shows a schematic block configuration example 2 of the secondary-side controller 16S applicable to the PD device according to the first embodiment.

In the PD device according to the first embodiment, as shown in FIG. 13, the secondary-side controller 16S may include: a transceiver 26 connected to the output capacitor C_(o); and a switch (S1, T0, T1) connected to the error amplifier (EA) 21, the switch (S1, T0, T1) configured to select between the transceiver 26 and the control input supplied into the control terminal CT.

Configuration Example 3

FIG. 14 shows a schematic block configuration example 3 of the secondary-side controller 16S applicable to the PD device according to the first embodiment.

In the PD device according to the first embodiment, the secondary-side controller 16S may include a transceiver 26 connected to an error amplifier (EA) 21, the transceiver 26 configured to select between the output capacitor C_(o) and the control input supplied into the control terminal CT, as shown in FIG. 14. In this context, the transceiver 26 can execute conversion and switching of transmission and reception signal between the output capacitor C_(o) and the control input supplied into the control terminal CT.

Configuration Example 4

FIG. 15 shows a schematic block configuration example 4 of the secondary-side controller 16S applicable to the PD device according to the first embodiment.

In the PD device according to the first embodiment, as shown in FIG. 15, the secondary-side controller 16S may include: a first transceiver 26 ₀ connected to the output capacitor C_(o); and a second transceiver 26 ₁ connected to the control input supplied into the control terminal CT; and a switch (S1, T0, T1) connected to the error amplifier (EA) 21, the switch (S1, T0, T1) configured to select between the first transceiver 26 ₀ and the second transceiver 26 ₁. In this context, the first transceiver 26 ₀ and the second transceiver 26 ₁ include the same configuration.

Configuration Example 5

FIG. 16 shows a schematic block configuration example 5 of the secondary-side controller 16S applicable to the PD device according to the first embodiment.

In the PD device according to the first embodiment, as shown in FIG. 16, the secondary-side controller 16S may include: a first transceiver 26 ₀ connected to the output capacitor C_(o); and a second transceiver 26 ₁ connected to the control input supplied into the control terminal CT; and a switch (S1, T0, T1) connected to the error amplifier (EA) 21, the switch (S1, T0, T1) configured to select between the first transceiver 26 ₀ and the second transceiver 26 ₁. In this context, the first transceiver 26 ₀ and the second transceiver 26 ₁ include configurations different from each other.

Configuration Example 6

FIG. 17 shows a schematic block configuration example 6 of the secondary-side controller 16S applicable to the PD device according to the first embodiment.

In the PD device according to the first embodiment, as shown in FIG. 17, the secondary-side controller 16S may include: a first transceiver 26 ₀ connected to the output capacitor C_(o); and a plurality of second transceivers 26 ₁, 26 ₂, and 26 ₃ respectively connected to control inputs respectively supplied into a plurality of control terminals CT1, CT2, and CT3; and a switch (S1, T0, T1) connected to the error amplifier (EA) 21, the switch (S1, T0, T1) configured to select between the first transceiver 26 ₀ and the second transceivers 26 ₁, 26 ₂, and 26 ₃. In this context, the plurality of the second transceivers 26 ₁, 26 ₂, and 26 ₃ may include the same configuration, and the first transceiver 26 ₀ and the second transceivers 26 ₁, 26 ₂, and 26 ₃ may include configurations different from each other.

Configuration Example 7

FIG. 18 shows a schematic block configuration example 7 of the secondary-side controller 16S applicable to the PD device according to the first embodiment.

In the PD device according to the first embodiment, as shown in FIG. 18, the secondary-side controller 16S may include a switch (S1, T0, T1, T2, T3, . . . , Tn) connected to the error amplifier (EA) 21, the switch (S1, T0, T1, T2, T3, . . . , Tn) configured to select between the output capacitor C_(o) and a plurality of control inputs supplied into a plurality of control terminals CT1, CT2, CT3, . . . , CTn.

Configuration Example 8

FIG. 19 shows a schematic block configuration of the secondary-side controller and a power output circuit, applicable to the PD device according to the first embodiment.

Also in the schematic block configuration examples 1-7 of the secondary-side controller shown in FIGS. 12-18, there is provided a power output circuit 130 connected to the primary-side controller 30, the power output circuit 130 configured to supply output voltages to a plurality of VBUS outputs disposed in pairs with the plurality of the control inputs.

More specifically, as shown in FIG. 19, a plurality of VBUS power output terminals PT1, PT2, . . . , PTn disposed in pairs with a plurality of control terminals CT1, CT2, . . . , CT3 are provided, and the power output circuit 130 can supply the output voltages through the plurality of the VBUS power output terminals PT1, PT2, . . . , PTn.

FIG. 20 shows a schematic block configuration example 8 of the secondary-side controller 16S applicable to the PD device according to the first embodiment.

As shown in FIG. 20, the PD device 4 according to the first embodiment may include a power output circuit 130 connected to the primary-side controller 30, the power output circuit 130 configured to supply output voltages to a plurality of VBUS outputs disposed in pairs with the plurality of the control inputs; and the secondary-side controller 16S may include a switch (S1, T0, T1, T2, T3, . . . , Tn) configured to select a plurality of control inputs.

Moreover, as shown in FIG. 20, the plurality of the control inputs are respectively coupled to a plurality of control terminals CT1, CT2, . . . , CTn. Moreover, the respective control output signals of the PD device 4 according to the first embodiment can be output to external apparatuses through the plurality of the respective control terminals CT1, CT2, . . . , CTn.

Moreover, as shown in FIG. 20, the power output circuit 130 can supply the output voltages respectively through the plurality of the VBUS power output terminals PT1, PT2, PTn.

Configuration Example 9

FIG. 21 shows a schematic block configuration example 9 of the secondary-side controller 16 applicable to the PD device according to the first embodiment.

As shown in FIG. 21, the PD device 4 according to the first embodiment may include a power output circuit 130 connected to the primary-side controller 30, the power output circuit 130 configured to supply output voltages to a plurality of VBUS outputs disposed in pairs with the plurality of the control inputs; and the secondary-side controller 16 may include a port selector 116 configured to select the plurality of the control inputs.

Moreover, as shown in FIG. 21, the plurality of the control inputs are respectively coupled to a plurality of control terminals CT1, CT2, . . . , CTn. Moreover, the respective control output signals of the PD device 4 according to the first embodiment can be output to external apparatuses through the plurality of the respective control terminals CT1, CT2, . . . , CTn.

Moreover, as shown in FIG. 21, the power output circuit 130 can supply the output voltages respectively through the plurality of the VBUS power output terminals PT1, PT2, . . . , PTn.

Moreover, FIG. 22A shows a configuration example of the port selector 116, and FIG. 22B shows another configuration example of the port selector 116.

As shown in FIG. 22A, the port selector 116 may include: a CPU 125; and a switch SW connected to the CPU 125, the switch SW configured to select the plurality of the control terminals CT1, CT2, . . . , CTn.

Moreover, as shown in FIG. 22B, the port selector 116 may include a CPU 125 connected to the plurality of the control terminals CT1, CT2, . . . , CTn. More specifically, the CPU 125 itself may include a switch function configured to select the plurality of the control terminals CT1, CT2, . . . , CTn, in the example shown in FIG. 22B.

Configuration Example 10

FIG. 23 shows a schematic block configuration example 10 of the secondary-side controller 16 applicable to the PD device according to the first embodiment.

In the PD device according to the first embodiment, the secondary-side controller 16 may include a plurality of port selectors 116 ₁ and 116 ₂ as shown in FIG. 23.

As shown in FIG. 23, the control input terminals CT1 and CT2 are connected to the port selector 116 ₁, and the control input terminals CT3 and CT4 are connected to the port selector 116 ₂.

In the same manner as the configuration example 8 in FIG. 20 or the configuration example 9 in FIG. 21, the PD device 4 according to the first embodiment may include a power output circuit 130 connected to the primary-side controller 30, the power output circuit 130 configured to supply output voltages to a plurality of VBUS outputs disposed in pairs with the plurality of the control inputs.

In the same manner as the configuration example 9 shown in FIGS. 22A and 22B, each of the port selectors 116 ₁ and 116 ₂ may include a CPU and a switch connected to the CPU, the switch configured to select the plurality of the control terminals. Alternatively, each of the port selectors 116 ₁ and 116 ₂ may include a CPU connected to the plurality of the control terminals.

(Example of Connection through Receptacle)

FIG. 24 shows a schematic configuration of connecting between the PD devices according to the first embodiment through receptacles 41R and 42R.

Each of the receptacles 41R and 42R has a VBUS terminal, a CC1 terminal, a CC2 terminal, a D− terminal, a D+ terminal, and a GND terminal, and is configured to connect between the PD devices according to the first embodiment.

The VBUS terminal is connected to a power line POL used for bidirectional communications between the devices. One of the VBUS terminals is connected to a load (LOAD), and another of the VBUS terminals is connected to a variable power supply of approximately 5V to approximately 20V (MAX), for example. In this context, the variable power supply corresponds to the output voltage of the PD device according to the first embodiment. The GND terminal is a ground terminal (earth terminal).

The CC1 terminal and the CC2 terminal are communication terminals connected to a communication dedicated line COL used for bidirectional communications between the devices. The connecting configuration is set so that a constant voltage can be supplied to the CC1 terminal by a power supply VDD and impedance circuits Z1 and Z2, and data (BMC) is supplied from one of the CC1 terminals and then is received into the other of the CC1 terminals through a comparator, for example. The CC1 terminal may be connected to a constant current supply, instead of supplying the constant voltage. In this context, each of the impedance circuits Z1 and Z2 can be configured by including a parallel circuit including a current source and a resistance, and can select any one of the current source or the resistance. Moreover, a voltage control regulator (VCON) may be connected to one of the CC2 terminals, and a load (LOAD) may be connected to the other of the CC2 terminals.

The D− terminal and the D+ terminal are serial-data interface terminals for realizing a flipping function.

(Configuration Example of Inside of Receptacle)

FIG. 25 shows a schematic configuration of the inside of the receptacle 41R (42R) applicable to the PD device according to the first embodiment. In the internal configuration of the receptacle 41R (42R), the VBUS, CC1, CC2, D−, D+, and GND terminals are disposed on both sides of a substrate used for disposing terminals.

Accordingly, there is no need to distinguish between the upper or lower surface (front or back surface) of the receptacle 41R (42R).

(Example of Connection through Receptacle and Plug)

FIG. 26 shows a schematic configuration of connecting between the PD devices according to the first embodiment through a receptacle 41R (42R) and a plug 41P (42P). As shown in FIG. 26, by inserting the plug 41P (42P) into the receptacle 41R (42R), an electric power supply becomes available through the power line POL, and data communications also become available through the communication dedicated line COL.

FIG. 27A shows a schematic configuration of connecting between the PD devices according to the first embodiment through the receptacles 41R and 42R, plugs 2, and a cable (POL/COL). In this context, the plug 2 corresponds to the plug 41P (42P) shown in FIG. 20.

The plug 2 has a shape corresponding to the shape of the receptacles 41R and 42R shown in FIG. 25, and includes an electrode on one side surface thereof, and has the VBUS, CC1, CC2, D−, D+, and GND terminals. Furthermore, the plug 2 also includes an electrode on a back surface side thereof, and has the GND, D+, D−, CC2, CC1, and VBUS terminals. Accordingly, the plug 2 can be called as an advanced USB plug, and the receptacle 41R (42R) can be called as an advanced USB receptacle.

A connecting relationship between the two receptacles 41R and 42R is expressed as shown in FIG. 27B. As shown in FIG. 27B, four kinds of connecting relationship between the two receptacles (41R, 42R) with respect to the plugs (41P, 42P) are available, i.e., a relationship between a normal connection N and a normal connection N, a relationship between a normal connection N and a reverse connection R, a relationship between a reverse connection R and a normal connection N, and a relationship between a reverse connection R and a reverse connection R.

(Connecting Relationship Between Power Circuits)

FIG. 28A shows a schematic block configuration for explaining a connecting relationship between the power output circuit 130 applicable to the PD device according to the first embodiment and a load circuit 134, and FIG. 28B shows a schematic circuit configuration corresponding to the configuration shown in FIG. 28A.

It can be assumed that the load circuit 134 is disposed in an external device which is externally connected through the connection between the receptacles 41R and 42R.

In the example shown in FIG. 28A, a plurality of VBUS outputs are included in the power output circuit 130, and the respective VBUS output are connected to the load circuit 134 through respective power lines POL1, POL2, and PLO3. As shown in FIG. 28B, the power output circuit 130 includes a plurality of switches (SWP, P1, P2, P3); the load circuit 134 includes a plurality of switches (SWP, P1, P2, P3) respectively connected to the power lines POL1, POL2, and PLO3, and is connected to loads 1-3. The power output circuit 130 and the load circuit 134 are bidirectionally connected to each other.

A specific circuit configuration of the power output circuit 130 shown in FIG. 28B is expressed as shown in FIG. 29A. As shown in FIG. 29A, the power output circuit 130 is includes: a buffer 136 connected to the primary-side controller 30, and a plurality of switches (SWP1, SWP2, SWP3) connected to an output of the buffer 136. In this context, the plurality of switches (SWP1, SWP2, SWP3) can be configured to include bidirectional switches, for example, as shown in FIG. 29B.

(Configuration of Power Output Circuit)

Configuration Example 1

FIG. 30 shows a schematic circuit configuration example 1 of the power output circuit 130 applicable to the PD device according to the first embodiment.

As shown in FIG. 30, the schematic circuit configuration example 1 of the power output circuit 130 applicable to the PD device according to the first embodiment includes a configuration of being branched from the secondary-side inductance L2 of the transformer 15 in the diode rectification type DC/DC converter 13. More specifically, a VBUS output VBUS1 is obtained from an output of a diode D11 and a capacitor C11 through a switch SW1 and a filter circuit L_(F1) and C_(F1), a VBUS output VBUS2 is obtained from an output of a diode D12 and a capacitor C12 through a switch SW2 and filter circuit L_(F2) and C_(F2), and a VBUS output VBUS3 is obtained from an output of a diode D13 and a capacitor C13 through a switch SW3 and a filter circuit L_(F3) and C_(F3).

Configuration Example 2

FIG. 31 shows a schematic circuit configuration example 2 of the power output circuit 130 applicable to the PD device according to the first embodiment.

As shown in FIG. 31, the schematic circuit configuration example 2 of the power output circuit 130 applicable to the PD device according to the first embodiment includes a plurality of DC/DC converters 13 ₁, 13 ₂, . . . , 13 _(n). More specifically, an VBUS output VBUS1 is obtained from an output of the DC/DC converter 13 ₁ through a switch SW1 and a filter circuit L_(F1) and C_(F1), an VBUS output VBUS2 is obtained from an output of the DC/DC converter 13 ₂ through a switch SW2 and a filter circuit L_(F2) and C_(F2), . . . , and a VBUS output VBUSn is obtained from an output of the DC/DC converter 13 _(n) through a switch SWn and a filter circuit L_(Fn) and C_(Fn).

CONFIGURATION EXAMPLE 3

FIG. 32 shows a schematic circuit configuration example 3 of the power output circuit 130 applicable to the PD device according to the first embodiment.

As shown in FIG. 32, the schematic circuit configuration example 3 of the power output circuit 130 applicable to the PD device according to the first embodiment includes: a diode rectification type DC/DC converter 13; and a plurality of DC/DC converters 113 ₁, 113 ₂, . . . , 113 _(n) connected to an output of the diode rectification type DC/DC converter 13. More specifically, an VBUS output VBUS1 is obtained from an output of the DC/DC converter 113 ₁ through a switch SW1 and a filter circuit L_(F1) and C_(F1), an VBUS output VBUS2 is obtained from an output of the DC/DC converter 113 ₂ through a switch SW2 and a filter circuit L_(F2) and C_(F2), . . . , and a VBUS output VBUSn is obtained from an output of the DC/DC converter 113 _(n) through a switch SWn and a filter circuit L_(Fn) and C_(Fn).

CONFIGURATION EXAMPLE 4

FIG. 33 shows a schematic circuit configuration example 4 of the power output circuit 130 applicable to the PD device according to the first embodiment.

As shown in FIG. 33, the schematic circuit configuration example 4 of the power output circuit 130 applicable to the PD device according to the first embodiment includes: a diode rectification type DC/DC converter 13; and a plurality of MOS switches (MS₁₁ and MS₁₂) (MS₂₁ and MS₂₂), and (MS₃₁ and MS₃₂) connected to an output of the DC/DC converter 13, wherein conductive states of the MOS switches can be controlled by the secondary-side controller 16. More specifically, a VBUS output VBUS1, a VBUS output VBUS2, and a VBUS output VBUS3 are respectively obtained from outputs of the plurality of the MOS switches (MS₁₁ and MS₁₂), (MS₂₁ and MS₂₂), and (MS₃₁ and MS₃₂).

In the PD device according to the first embodiment, as shown in FIG. 34A, the secondary-side controller 16 may include a voltage and current control circuit 17 configured to execute determination of voltage and current on the basis of the control input signal, the voltage and current control circuit 17 configured to control the output voltage V_(o) and the output current I_(o). Moreover, the control input signal may include a signal based on a half-duplex communication system. For example, a frequency may be fixed at 150 kHz (300 kbps), and a pulse width of ON/OFF of “1”/“0” may be modulated.

Moreover, as shown in FIG. 34B, the secondary-side controller 16 applied to the PD device according to the first embodiment may further contain a frequency conversion circuit (FSK) 161, a transmitter 164 and receiver 165. In this context, a frequency conversion from approximately 23.2 MHz to approximately 500 kHz, for example, can be realized by the frequency conversion circuit 161, the transmitter 164, and the receiver 165.

Modified Example 6

A PD device 4 according to a modified example 6 of the first embodiment may include a secondary-side controller 16E in which the error amplifier 21 is contained, as shown in FIG. 35. More specifically, as shown in FIG. 35, the secondary-side controller 16E and the error amplifier 21 may be integrally formed with each other. Other configurations are the same as those of the first embodiment.

Modified Example 7

Moreover, a PD device 4 according to a modified example 7 of the first embodiment may include a secondary-side controller 161 in which an error amplifier 21 and an insulation circuit 20 are contained, as shown in FIG. 36. More specifically, as shown in FIG. 36, the secondary-side controller 16, the error amplifier 21, and the insulation circuit 20 may be integrally formed with one another. Other configurations are the same as those of the first embodiment.

Modified Example 8

Moreover, a PD device 4 according to a modified example 6 of the first embodiment may include a secondary-side controller 16P in which the error amplifier 21, the insulation circuit 20, and the primary-side controller 30 are contained, as shown in FIG. 37. More specifically, as shown in FIG. 34, the secondary-side controller 16, the error amplifier 21, the insulation circuit 20, and the primary-side controller 30 may be integrally formed with one another. Other configurations are the same as those of the first embodiment.

According to the first embodiment and its modified examples, there can be provided the PD device capable of switching with respect to the plurality of apparatuses, and capable of controlling the output voltage value and the available output current value (MAX value).

Second Embodiment

As shown in FIG. 38, a PD device 4 according to the second embodiment includes: a DC/DC converter 13 disposed between an input and a VBUS output; a primary-side controller 30 configured to control an input current of the DC/DC converter 13; a secondary-side controller 16 coupled to a plurality of control inputs, the secondary-side controller 16 configured to executed a signal conversion of control input signals of the plurality of the control inputs, and configured to feed back the control input signals subjected to the signal conversion to the primary-side controller 30. In this context, the primary-side controller 30 varies an output voltage value and an available output current value (MAX value) of the DC/DC converter 13 by controlling the input current on the basis of the control input signals fed back from the secondary-side controller 16.

The PD device 4 according to the second embodiment may include an output capacitor C_(o) connected between the VBUS output and the secondary-side controller 16, as shown in FIG. 38.

The secondary-side controller 16 can further execute signal conversion and switching of an AC signal component of the VBUS output. The AC signal component of the VBUS output is coupled to the secondary-side controller 16 through the output capacitor C_(o) connected between the VBUS output and the secondary-side controller 16.

Moreover, as shown in FIG. 38, the PD device 4 according to the second embodiment may include a power output circuit 130 connected to the primary-side controller 30, the power output circuit 130 configured to supply output voltages to a plurality of VBUS power outputs disposed in pairs with the plurality of the control inputs.

Moreover, as shown in FIG. 38, the PD device 4 according to the second embodiment may include a plurality of control terminals CT1, CT2, . . . , CTn, and the plurality of the control inputs may be respectively coupled to the plurality of the controls terminals CT1, CT2, . . . , CTn. Moreover, a control output signal of the PD device 4 according to the second embodiment can be output to an external apparatus through the plurality of the control terminals CT1, CT2, . . . , CTn.

Moreover, as shown in FIG. 38, the PD device 4 according to the second embodiment includes a plurality of VBUS power output terminals PT1, PT2, . . . , PTn, and the power output circuit 130 can supply the output voltages through the plurality of the VBUS power output terminals PT1, PT2, . . . , PTn.

Moreover, the PD device 4 according to the second embodiment may include AC coupling capacitors (not shown) coupled to the plurality of the control inputs, and the secondary-side controller 16 may be coupled to the plurality of the control inputs respectively through the AC coupling capacitors.

In the PD device 4 according to the second embodiment, the DC/DC converter 13 is a diode rectification type converter. More specifically, the DC/DC converter 13 includes: a transformer 15; a first MOS transistor Q1 and a current sensing resistor RS each connected in series between the primary-side inductance L1 of the transformer 15 and ground potential; a diode D1 connected between the secondary-side inductance L2 of the transformer 15 and the output; and a first capacitor C1 connected between the output and the ground potential.

In the PD device 4 according to the second embodiment, the secondary-side controller 16 can execute a frequency conversion, a DC level conversion, or an amplitude level conversion, for example.

Moreover, as shown in FIG. 38, the PD device 4 according to the second embodiment may include a MOS switch Q_(SW) connected to the output of the DC/DC converter 13 and configured to interrupt an output voltage of the DC/DC converter 13. The output of the DC/DC converter 13 and the power line output (VBUS) can be interrupted by the MOS switch Q_(SW). ON/OFF control for the MOS switch Q_(SW) can be executed by the secondary-side controller 16. Other configurations are the same as those of the first embodiment.

According to the second embodiment, there can be provided the PD device capable of switching with respect to the plurality of apparatuses, and capable of controlling the output voltage value and the available output current value (MAX value).

Third Embodiment

As shown in FIG. 39, a PD device 4 according to the third embodiment includes: a DC/DC converter 13 disposed between an input and a VBUS output; a primary-side controller 30 configured to control an input current of the DC/DC converter 13; and a secondary-side controller 16 coupled to a plurality of control inputs, the secondary-side controller 16 configured to executed a signal conversion of control input signals of the plurality of the control inputs, and configured to feed back the control input signals subjected to the signal conversion to the primary-side controller 30. In this context, the primary-side controller 30 varies an output voltage value and an available output current value (MAX value) of the DC/DC converter 13 by controlling the input current on the basis of the control input signals fed back from the secondary-side controller 16.

The PD device 4 according to the third embodiment may include an output capacitor C_(o) connected between the VBUS output and the secondary-side controller 16, as shown in FIG. 39.

The secondary-side controller 16 can further execute signal conversion and switching of an AC signal component of the VBUS output. The AC signal component of the VBUS output is coupled to the secondary-side controller 16 through the output capacitor C_(o) connected between the VBUS output and the secondary-side controller 16.

Moreover, as shown in FIG. 39, the PD device 4 according to the third embodiment may include a power output circuit 130 connected to the primary-side controller 30, the power output circuit 130 configured to supply output voltages to a plurality of VBUS power outputs disposed in pairs with the plurality of the control inputs.

Moreover, as shown in FIG. 39, the PD device 4 according to the third embodiment may include a plurality of control terminals CT1, CT2, . . . , CTn, and the plurality of the control inputs may be respectively coupled to the plurality of the controls terminals CT1, CT2, . . . , CTn. Moreover, a control output signal of the PD device 4 according to the third embodiment can be output to an external apparatus through the plurality of the control terminals CT1, CT2, . . . , CTn.

Moreover, as shown in FIG. 39, the PD device 4 according to the third embodiment includes a plurality of VBUS power output terminals PT1, PT2, . . . , PTn, and the power output circuit 130 can supply the output voltages through the plurality of the VBUS power output terminals PT1, PT2, . . . , PTn.

Moreover, the PD device 4 according to the third embodiment may include AC coupling capacitors (not shown) coupled to the plurality of the control inputs, and the secondary-side controller 16 may be coupled to the plurality of the control inputs respectively through the AC coupling capacitors.

In the PD device 4 according to the third embodiment, the DC/DC converter 13 is a synchronous rectification type converter. More specifically, the DC/DC converter 13 includes: a transformer 15; a first MOS transistor Q1 and a current sensing resistor RS each connected in series between the primary-side inductance L1 of the transformer 15 and ground potential; a second MOS transistor M1 connected between the secondary-side inductance L2 of the transformer 15 and the output; and a first capacitor C1 connected between the output and the ground potential.

In the PD device 4 according to the third embodiment, the secondary-side controller 16 can execute a frequency conversion, a DC level conversion, or an amplitude level conversion, for example.

In the PD device 4 according to the third embodiment, since the synchronous rectification method is adopted for the DC/DC converter, instead of the diode rectification system, DC/DC power conversion efficiency can be increased, compared with the second embodiment adapting the diode rectification system. Other configurations are the same as those of the first embodiment.

According to the third embodiment, there can be provided the PD device capable of switching with respect to the plurality of apparatuses, and capable of controlling the output voltage value and the available output current value (MAX value).

Fourth Embodiment

As shown in FIG. 40, a PD device 4 according to a fourth embodiment includes an AC/DC converter connected to an AC input, the AC/DC converter 300 composed of a fuse 11, a choke coil 12, a diode rectification bridge 14, capacitors C5, C6, C3, instead of the power source supply circuit 10 as in the first embodiment.

Moreover, there are included an auxiliary inductance L4 including the primary-side auxiliary winding in the transformer 15, and a diode D2 and a capacitor C4 connected in parallel to the auxiliary inductance L4 therein, and the DC voltage VCC is supplied from the capacitor C4 to the primary-side controller 30.

As shown in FIG. 40, the PD device 4 according to the fourth embodiment includes: a DC/DC converter 13 disposed between an input (DC output of the AC/DC converter) and a VBUS output; a primary-side controller 30 configured to control an input current of the DC/DC converter 13; and a secondary-side controller 16 coupled to a plurality of control inputs, the secondary-side controller 16 configured to executed a signal conversion of control input signals of the plurality of the control inputs, and configured to feed back the control input signals subjected to the signal conversion to the primary-side controller 30. In this context, the primary-side controller 30 varies an output voltage value and an available output current value (MAX value) of the DC/DC converter 13 by controlling the input current on the basis of the control input signals fed back from the secondary-side controller 16.

The PD device 4 according to the fourth embodiment may include an output capacitor C_(o) connected between the VBUS output and the secondary-side controller 16, as shown in FIG. 40.

Moreover, as shown in FIG. 40, the PD device 4 according to the fourth embodiment may include a power output circuit 130 connected to the primary-side controller 30, the power output circuit 130 configured to supply output voltages to a plurality of VBUS outputs disposed in pairs with the plurality of the control inputs. In this context, the power output circuit 130 may include a plurality of DC/DC converters in the same manner as the configuration shown in FIG. 3.

Moreover, as shown in FIG. 40, there may be included a plurality of control terminals CT1, CT2, . . . , CTn, and a plurality of the control inputs may be coupled to the plurality of the controls terminals CT1, CT2, . . . , CTn. Moreover, a control output signal of the PD device 4 according to the fourth embodiment can be output to an external apparatus through the plurality of the control terminals CT1, CT2, . . . , CTn.

Although PDDET1 and PDDET2 from USB receptacle are described on the secondary-side controller 16, the PDDET1 and PDDET2 may be omitted.

In the PD device 4 according to the fourth embodiment, the DC/DC converter 13 is a diode rectification type converter. More specifically, the DC/DC converter 13 includes: a transformer 15; a first MOS transistor Q1 and a current sensing resistor RS each connected in series between the primary-side inductance L1 of the transformer 15 and ground potential; a diode D1 connected between the secondary-side inductance L2 of the transformer 15 and the output; and a first capacitor C1 connected between the output and the ground potential.

Moreover, in the PD device 4 according to the fourth embodiment, the secondary-side controller 16 can execute a frequency conversion, a DC level conversion, or an amplitude level conversion, for example.

According to the fourth embodiment, there can be provided the PD device capable of switching with respect to the plurality of apparatuses, and capable of controlling the output voltage value and the available output current value (MAX value).

Fifth Embodiment

As shown in FIG. 41, a PD device 4 according to the fifth embodiment includes an AC/DC converter connected to an AC input, the AC/DC converter 300 composed of a fuse 11, a choke coil 12, a diode rectification bridge 14, capacitors C5, C6, C3, instead of the power source supply circuit 10 as in the first embodiment.

Moreover, there are included an auxiliary inductance L4 including the primary-side auxiliary winding in the transformer 15, and a diode D2 and a capacitor C4 connected in parallel to the auxiliary inductance L4 therein, and the DC voltage VCC is supplied from the capacitor C4 to the primary-side controller 30.

As shown in FIG. 41, the PD device 4 according to the fifth embodiment includes: a DC/DC converter 13 disposed between an input (DC output of the AC/DC converter) and a VBUS output; a primary-side controller 30 configured to control an input current of the DC/DC converter 13; and a secondary-side controller 16 coupled to a plurality of control inputs, the secondary-side controller 16 configured to executed a signal conversion of control input signals of the plurality of the control inputs, and configured to feed back the control input signals subjected to the signal conversion to the primary-side controller 30. In this context, the primary-side controller 30 varies an output voltage value and an available output current value (MAX value) of the DC/DC converter 13 by controlling the input current on the basis of the control input signals fed back from the secondary-side controller 16.

The PD device 4 according to the fifth embodiment may include an output capacitor C_(o) connected between the VBUS output and the secondary-side controller 16, as shown in FIG. 41.

Moreover, as shown in FIG. 41, the PD device 4 according to the fifth embodiment may include a power output circuit 130 connected to the primary-side controller 30, the power output circuit 130 configured to supply output voltages to a plurality of VBUS outputs disposed in pairs with the plurality of the control inputs. In this context, the power output circuit 130 may include a plurality of DC/DC converters in the same manner as the configuration shown in FIG. 3.

Moreover, as shown in FIG. 41, there may be included a plurality of control terminals CT1, CT2, . . . , CTn, and a plurality of the control inputs may be coupled to the plurality of the controls terminals CT1, CT2, . . . , CTn. Moreover, a control output signal of the PD device 4 according to the fifth embodiment can be output to an external apparatus through the plurality of the control terminals CT1, CT2, . . . , CTn.

Although PDDET1 and PDDET2 from USB receptacle are described on the secondary-side controller 16, the PDDET1 and PDDET2 may be omitted.

In the PD device 4 according to the fifth embodiment, the DC/DC converter 13 is a diode rectification type converter. More specifically, the DC/DC converter 13 includes: a transformer 15; a first MOS transistor Q1 and a current sensing resistor RS each connected in series between the primary-side inductance L1 of the transformer 15 and ground potential; a diode D1 connected between the secondary-side inductance L2 of the transformer 15 and the output; and a first capacitor C1 connected between the output and the ground potential.

Moreover, as shown in FIG. 41, the PD device 4 according to the fifth embodiment may include the insulation circuit 20 connected to the secondary-side controller 16, the insulation circuit 20 configured to feed back the control input signals to the primary-side controller 30.

Moreover, as shown in FIG. 41, the PD device 4 according to the fifth embodiment may include the error amplifier for error compensation connected to the secondary-side controller 16, the error amplifier 21 configured to feed back the control input signals to the insulation circuit 20. In this context, as shown in FIG. 41, the error amplifier 21 includes discrete components, e.g. a power amplifier 44, a diode D3, and resistors R5 and R6.

Moreover, in the PD device 4 according to the fifth embodiment, the secondary-side controller 16 can execute a frequency conversion, a DC level conversion, or an amplitude level conversion, for example.

Moreover, as shown in FIG. 41, the PD device 4 according to the fifth embodiment may include a MOS switch Q_(SW) connected to the output of the DC/DC converter 13 and configured to interrupt an output voltage of the DC/DC converter 13. The output of the DC/DC converter 13 and the power line output (VBUS) can be interrupted by the MOS switch Q_(SW). ON/OFF control for the MOS switch Q_(SW) can be executed by the secondary-side controller 16. Other configurations are the same as those of the second embodiment.

According to the fifth embodiment, there can be provided the PD device capable of switching with respect to the plurality of apparatuses, and capable of controlling the output voltage value and the available output current value (MAX value).

Sixth Embodiment

As shown in FIG. 42, a PD device 4 according to a sixth embodiment includes an AC/DC converter connected to an AC input, the AC/DC converter 300 composed of a fuse 11, a choke coil 12, a diode rectification bridge 14, capacitors C5, C6, C3, instead of the power source supply circuit 10 as in the third embodiment.

Moreover, there are included an auxiliary inductance L4 including the primary-side auxiliary winding in the transformer 15, and a diode D2 and a capacitor C4 connected in parallel to the auxiliary inductance L4 therein, and the DC voltage VCC is supplied from the capacitor C4 to the primary-side controller 30.

As shown in FIG. 42, the PD device 4 according to the sixth embodiment includes: a DC/DC converter 13 disposed between an input (DC output of the AC/DC converter) and a VBUS output; a primary-side controller 30 configured to control an input current of the DC/DC converter 13; and a secondary-side controller 16 coupled to a plurality of control inputs, the secondary-side controller 16 configured to executed a signal conversion of control input signals of the plurality of the control inputs, and configured to feed back the control input signals subjected to the signal conversion to the primary-side controller 30. In this context, the primary-side controller 30 varies an output voltage value and an available output current value (MAX value) of the DC/DC converter 13 by controlling the input current on the basis of the control input signals fed back from the secondary-side controller 16.

The PD device 4 according to the sixth embodiment may include an output capacitor C_(o) connected between the VBUS output and the secondary-side controller 16, as shown in FIG. 42.

Moreover, as shown in FIG. 42, the PD device 4 according to the sixth embodiment may include a power output circuit 130 connected to the primary-side controller 30, the power output circuit 130 configured to supply output voltages to a plurality of VBUS outputs disposed in pairs with the plurality of the control inputs. In this context, the power output circuit 130 may include a plurality of DC/DC converters in the same manner as the configuration shown in FIG. 3.

Moreover, as shown in FIG. 42, there may be included a plurality of control terminals CT1, CT2, . . . , CTn, and a plurality of the control inputs may be coupled to the plurality of the controls terminals CT1, CT2, . . . , CTn. Moreover, a control output signal of the PD device 4 according to the sixth embodiment can be output to an external apparatus through the plurality of the control terminals CT1, CT2, . . . , CTn.

Although PDDET1 and PDDET2 from USB receptacle are described on the secondary-side controller 16, the PDDET1 and PDDET2 may be omitted.

In the PD device 4 according to the sixth embodiment, the DC/DC converter 13 is a synchronous rectification type converter. More specifically, the DC/DC converter 13 includes: a transformer 15; a first MOS transistor Q1 and a current sensing resistor RS each connected in series between the primary-side inductance L1 of the transformer 15 and ground potential; a second MOS transistor M1 connected between the secondary-side inductance L2 of the transformer 15 and the output; and a first capacitor C1 connected between the output and the ground potential.

Moreover, in the PD device 4 according to the sixth embodiment, the secondary-side controller 16 can execute a frequency conversion, a DC level conversion, or an amplitude level conversion, for example.

In the PD device 4 according to the sixth embodiment, since the synchronous rectification method is adopted for the DC/DC converter, instead of the diode rectification system, and thereby DC/DC power conversion efficiency can be increased, compared with the second, fourth, and fifth embodiments adapting the diode rectification system. Other configurations are the same as those of the third embodiment.

According to the sixth embodiment, there can be provided the PD device capable of switching with respect to the plurality of apparatuses, and capable of controlling the output voltage value and the available output current value (MAX value).

Seventh Embodiment

As shown in FIG. 43, a PD device 4 according to a seventh embodiment includes an AC/DC converter connected to an AC input, the AC/DC converter 300 composed of a fuse 11, a choke coil 12, a diode rectification bridge 14, capacitors C5, C6, C3, instead of the power source supply circuit 10 as in the third embodiment, in the same manner as the sixth embodiment.

Moreover, there are included an auxiliary inductance L4 including the primary-side auxiliary winding in the transformer 15, and a diode D2 and a capacitor C4 connected in parallel to the auxiliary inductance L4 therein, and the DC voltage VCC is supplied from the capacitor C4 to the primary-side controller 30.

As shown in FIG. 43, the PD device 4 according to the seventh embodiment includes: a DC/DC converter 13 disposed between an input (DC output of the AC/DC converter) and a VBUS output; a primary-side controller 30 configured to control an input current of the DC/DC converter 13; and a secondary-side controller 16 coupled to a plurality of control inputs, the secondary-side controller 16 configured to executed a signal conversion of control input signals of the plurality of the control inputs, and configured to feed back the control input signals subjected to the signal conversion to the primary-side controller 30. In this context, the primary-side controller 30 varies an output voltage value and an available output current value (MAX value) of the DC/DC converter 13 by controlling the input current on the basis of the control input signals fed back from the secondary-side controller 16.

The PD device 4 according to the sixth embodiment may include an output capacitor C_(o) connected between the VBUS output and the secondary-side controller 16, as shown in FIG. 43.

Moreover, as shown in FIG. 43, the PD device 4 according to the seventh embodiment may include a power output circuit 130 connected to the primary-side controller 30, the power output circuit 130 configured to supply output voltages to a plurality of VBUS outputs disposed in pairs with the plurality of the control inputs. In this context, the power output circuit 130 may include a plurality of DC/DC converters in the same manner as the configuration shown in FIG. 3.

Moreover, as shown in FIG. 43, there may be included a plurality of control terminals CT1, CT2, . . . , CTn, and a plurality of the control inputs may be coupled to the plurality of the controls terminals CT1, CT2, . . . , CTn. Moreover, a control output signal of the PD device 4 according to the seventh embodiment can be output to an external apparatus through the plurality of the control terminals CT1, CT2, . . . , CTn.

Although PDDET1 and PDDET2 are described on the secondary-side controller 16, the PDDET1 and PDDET2 may be omitted.

In the PD device 4 according to the seventh embodiment, the DC/DC converter 13 is a synchronous rectification type converter. More specifically, the DC/DC converter 13 includes: a transformer 15; a first MOS transistor Q1 and a current sensing resistor RS each connected in series between the primary-side inductance L1 of the transformer 15 and ground potential; a second MOS transistor M1 connected between the secondary-side inductance L2 of the transformer 15 and the output; and a first capacitor C1 connected between the output and the ground potential.

Moreover, as shown in FIG. 43, the PD device 4 according to the seventh embodiment may include the insulation circuit 20 connected to the secondary-side controller 16, the insulation circuit 20 configured to feed back the control input signals to the primary-side controller 30.

Moreover, as shown in FIG. 43, the PD device 4 according to the seventh embodiment may include the error amplifier 21 for error compensation connected to the secondary-side controller 16 and configured to feed back the control input signals to the insulation circuit 20. In this context, as shown in FIG. 43, the error amplifier 21 includes discrete components, e.g. a power amplifier 44, a diode D3, and resistors R5 and R6.

Moreover, in the PD device 4 according to the seventh embodiment, the secondary-side controller 16 can execute a frequency conversion, a DC level conversion, or an amplitude level conversion, for example.

In the PD device 4 according to the seventh embodiment, since the synchronous rectification method is adopted for the DC/DC converter, instead of the diode rectification system, and thereby DC/DC power conversion efficiency can be increased, compared with the second, fourth, and fifth embodiments adapting the diode rectification system.

Moreover, as shown in FIG. 43, the PD device 4 according to the seventh embodiment may include a MOS switch Q_(SW) connected to the output of the DC/DC converter 13 and configured to interrupt an output voltage of the DC/DC converter 13. The output of the DC/DC converter 13 and the power line output (VBUS) can be interrupted by the MOS switch Q_(SW). ON/OFF control for the MOS switch Q_(SW) can be executed by the secondary-side controller 16. Other configurations are the same as those of the sixth embodiment.

According to the seventh embodiment, there can be provided the PD device capable of switching with respect to the plurality of apparatuses, and capable of controlling the output voltage value and the available output current value (MAX value).

(MOS Switch)

As shown in FIG. 44, a schematic circuit block configuration example of a switch SW applicable to the PD device 4 according to the first embodiment, or a MOS switch Q_(SW) applicable to the PD device according to the second, third, fifth or seventh embodiment includes: two n-channel MOSFETs Q_(n1) and Q_(n2) connected to each other in series; and MOSFETs Q_(D1) and Q_(D2) for discharging respectively connected to both ends of the n channel MOSFETs Q_(n) 1 and Q_(n) 2 connected to each other in series.

In the PD device 4 according to the first to seventh embodiments, each gate of the two n-channel MOSFETs Q_(n1) and Q_(n2) connected to each other in series is connected to the secondary-side controller 16, and ON/OFF of MOSFETs Q_(n1) and Q_(n2) is controlled by the secondary-side controller 16. A voltage and current control circuit 17 may be contained in the secondary-side controller 16.

(AC Adapter/AC Charger)

The PD device 4 according to the first to eighth embodiments can be contained in AC adapters/AC chargers 3, as shown in FIGS. 45 to 50.

In examples of wire connection for connecting a plug 2 capable of being connected to an outlet 1 to the AC adapter/AC charger 3 using a cable, FIG. 45A shows an example of connecting the secondary-side controller 16 in the AC adapter/AC charger 3 to external plugs 2A and 2B, and FIG. 45B shows another example thereof.

In FIG. 45A, a control input signal of USB PD 4U and a control input signal of the PD device (PD) 4 according to the embodiments can be switched by the secondary-side controller 16. The secondary-side controller 16 can be contained in the PD device (PD) 4.

In FIG. 45A, the secondary-side controller 16 and the plug 2A are connected to each other by a power line POL, and the secondary-side controller 16 and the plug 2B are connected to each other by a power line POL and a communication dedicated line COL.

Each of the USB PD 4U and the PD device (PD) 4 can be bidirectionally connected to the secondary-side controller 16, as shown in FIG. 45A. In FIG. 45B, the control input signal of USB PD 4U and the control input signal of the PD device (PD) 4 according to the embodiments can be switched by a plurality of secondary-side controllers 16 ₁ and 16 ₂. The secondary-side controllers 16 ₁ and 16 ₂ can be respectively contained in the USB PD 4U and the PD device (PD) 4.

In FIG. 45B, the secondary-side controller 16 ₁ and the plug 2A are connected to each other by a power line POL, and the secondary-side controller 16 ₂ and the plug 2B are connected to each other by a power line POL and a communication dedicated line COL.

The USB PD 4U and the PD device (PD) 4 can be bidirectionally and respectively connected to the secondary-side controllers 16 ₁ and 16 ₂, as shown in FIG. 45B.

One or a plurality of the secondary-side controllers 16 can be contained in the AC adapter/AC charger 3. In the AC adapter/AC charger 3 simultaneously including the USB PD 4U and the PD device (PD) 4, the number of extraction of the outputs can be variously selected, through such a signal conversion and switching circuit operation. For example, it is possible to set a ratio of the number of extraction in the USB PD 4U and the PD device (PD) 4 as 1:N, 1:1, or N:1, where N is an integer greater than or equal to 2.

In examples of containing the plug 2 capable of being connected to the outlet 1 in the AC adapter/AC charger 3, FIG. 46A shows an example of including the USB PD 4U and the PD device (PD) 4 according to the embodiments in the AC adapter/AC charger 3, and FIG. 46B shows an example of connecting external plugs 2A, 2B to receptacles 41UR, 41R contained in the AC adapter/AC charger 3.

In FIG. 46A, the control input signal of the USB PD 4U and the control input signal of the PD device (PD) 4 can be switched by the secondary-side controllers 16 ₁ and 16 ₂. The secondary-side controllers 16 ₁ and 16 ₂ can be respectively contained in the USB PD 4U and the PD device (PD) 4.

The USB PD 4U and the PD device (PD) 4 can be bidirectionally and respectively connected to the secondary-side controllers 16 ₁ and 16 ₂, as shown in FIG. 46A.

In FIG. 46B, the control input signal of the receptacle 41UR used for the USB PD 4U and the control input signal of the receptacle 41R used for the PD device (PD) 4 can be switched by the plurality of the secondary-side controllers 16 ₁ and 16 ₂.

The receptacle 41UR and the plug 2A are connected to each other by the power line POL. The receptacle 41R and the plug 2B are connected to each other by the power line POL and the communication dedicated line COL.

The secondary-side controllers 16 ₁ and 16 ₂ can be respectively and bidirectionally connected to the receptacles 41UR, 41R, as shown in FIG. 46B.

As shown in FIG. 47A, the AC adapter/AC charger 3 containing the PD device (PD) 4 according to the embodiments can be connected to the plug 2 connectable to the outlet 1 using a cable, and can be connected to the plug 5 disposed an outside of the AC adapter/AC charger 3. The secondary-side controller 16 and the plug 5 are connected to each other by the power line POL and the communication dedicated line COL. In FIG. 47A, the control input signal of the PD device (PD) 4 can be switched by the secondary-side controller 16. The secondary-side controller 16 can be contained in the PD device (PD) 4.

Moreover, as shown in FIG. 47B, the AC adapter/AC charger 3 containing the PD device according to the embodiments can be connected to the plug 2 connectable to the outlet 1 using a cable, and may include the receptacle 41R used for the PD device (PD) 4 and the secondary-side controller 16. In FIG. 47B, the control input signal of the receptacle 41R for the PD device (PD) 4 can be switched by the secondary-side controller 16.

Moreover, as shown in FIG. 47C, the AC adapter/AC charger 3 containing the PD device according to the embodiments can be connected to the plug 2 connectable to the outlet 1 using a cable, and may include a plug 41P. The plug 41P can be connected to the plug 5 disposed at the outside thereof. The plug 41P and the plug 5 are connected to each other by the power line POL and the communication dedicated line COL. In FIG. 47C, the control input signal of the plug 41P for the PD device (PD) 4 can be switched by the secondary-side controller 16.

Moreover, as shown in FIG. 48A, the AC adapter/AC charger 3 containing the PD device (PD) 4 according to the embodiments can be connected to the plug 2 connectable to the outlet 1 using a USB PD cable 6, and can also be connected to the plug 5 disposed at the outside of the AC adapter/AC charger 3. The secondary-side controller 16 and the plug 5 are connected to each other by the power line POL and the communication dedicated line COL. In FIG. 48A, the control input signal of the PD device (PD) 4 can be switched by the secondary-side controller 16. The secondary-side controller 16 can be contained in the PD device (PD) 4.

Moreover, as shown in FIG. 48B, the AC adapter/AC charger 3 containing the PD device according to the embodiments can be connected to the plug 2 connectable to the outlet 1 using the USB PD cable 6, and may also include a receptacle 41R. In FIG. 48B, the control input signal of the receptacle 41R for the PD device (PD) 4 can be switched by the secondary-side controller 16.

Moreover, as shown in FIG. 48C, the AC adapter/AC charger 3 containing the PD device according to the embodiments may be connected to the plug 2 connectable to the outlet 1 using the USB PD cable 6, and may also include a plug 41P. The plug 41P can be connected to the plug 5 disposed at the outside thereof. The plug 41P and the plug 5 are connected to each other by the power line POL and the communication dedicated line COL. In FIG. 48C, the control input signal of the plug 41P for the PD device (PD) 4 can be switched by the secondary-side controller 16.

Moreover, the plug 2 connectable to the outlet 1 may be contained in the AC adapter/AC charger 3 including the PD device according to the embodiments, as shown in FIGS. 49A to 49C.

As shown in FIG. 49A, the AC adapter/AC charger 3 containing the PD device (PD) 4 according to the embodiments and the plug 2 can be connected to the plug 5 disposed at the outside thereof. The secondary-side controller 16 and the plug 5 are connected to each other by the power line POL and the communication dedicated line COL. In FIG. 49A, the control input signal of the PD device (PD) 4 can be switched by the secondary-side controller 16. The secondary-side controller 16 can be contained in the PD device (PD) 4.

Moreover, the AC adapter/AC charger 3 containing the PD device according to the embodiments and the plug 2 may include the receptacle 41R, as shown in FIG. 49B. In FIG. 49B, the control input signal of the receptacle 41R for the PD device (PD) 4 can be switched by the secondary-side controller 16.

Moreover, the AC adapter/AC charger 3 containing the PD device according to the embodiments and the plug 2 may include the plug 41P, as shown in FIG. 49C. The plug 41P can be connected to the plug 5 disposed at the outside thereof. The plug 41P and the plug 5 are connected to each other by the power line POL and the communication dedicated line COL. In FIG. 49C, the control input signal of the plug 41P for the PD device (PD) 4 can be switched by the secondary-side controller 16.

A plurality of the PD devices according to the embodiments can be contained in the AC adapter/AC charger 3, as shown in FIGS. 50A to 50C. Moreover, the plug 2 connectable to the outlet 1 is also contained therein.

As shown in FIG. 50A, the AC adapter/AC charger 3 containing a plurality of the PD devices (PD) 41 and 42 according to the embodiments and the plug 2 can be respectively connected to a plurality of the plugs 51 and 52 disposed at the outside thereof. The secondary-side controller 16 and the plugs 51 and 52 are connected to each other by the power line POL and the communication dedicated line COL. In FIG. 50A, the control input signals of the PD devices (PD) 41 and 42 can be switched by the secondary-side controller 16. The secondary-side controller 16 can be contain in the PD devices (PD) 41 and 42.

Moreover, the AC adapter/AC charger 3 containing the plurality of the PD devices (PD) 41 and 42 according to the embodiments, and the plug 2 may include receptacles 41R and 42R, as shown in FIG. 50B. In FIG. 50B, the control input signals of the receptacles 41R and 42R for the PD devices (PD) 41 and 42 can be switched by the secondary-side controller 16.

Moreover, the AC adapter/AC charger 3 containing the plurality of the PD devices (PD) 41 and 42 according to the embodiments and the plug 2 may include plugs 41P and 42P, as shown in FIG. 50C. The plugs 41P and 42P can be respectively connected to the plugs 51 and 52 disposed at the outside thereof. The plugs 41P and 42P and the plugs 51 and 52 are respectively connected to each other by the power line POL and the communication dedicated line COL. In FIG. 50C, the control input signals of the plugs 41P and 42P for the PD devices (PD) 41 and 42 can be switched by the secondary-side controller 16.

(Electronic Apparatus)

As shown in FIGS. 51 to 52, the PD device according to the first to seventh embodiments can be contained in an electronic apparatus 7. As an electronic apparatus, there are applicable various apparatus, e.g. monitors, external hard disk drives, set top boxes, laptop PCs, tablet PCs, smartphones, battery charger systems, personal computers (PCs), docking stations, display apparatuses, printers, cleaners, refrigerators, facsimiles, telephones, car navigation systems, car computers, television sets, spectacles, head-mounted displays, fans, air-conditioners, laser displays, or wall outlets, for example.

FIG. 51A shows an example of including internal circuits 71 and 72 respectively containing the PD devices 41 and 42 and the receptacles 41R and 42R in electronic apparatus 7, in an example of wire connection for connecting the electronic apparatus 7 to the plug 2 capable of being connected to the outlet 1 using a cable.

Moreover, FIG. 51B shows an example of containing the plug 2 connectable to the outlet 1 in the electronic apparatus 7, and also including internal circuits 71 and 72 respectively containing the PD devices 41 and 42 and the receptacles 41R and 42R in the electronic apparatus 7.

In FIGS. 51A and 51B, the receptacles 41R and 42R are connected to each other by the power line POL and the communication dedicated line COL. In FIGS. 51A and 51B, the control input signals of the receptacles 41R and 42R for the PD devices (PD) 41 and 42 can be switched by the secondary-side controller 16.

FIG. 52A shows an example of including the receptacle 43R connected to the outside thereof in one internal circuit 72, in an example of containing the plug 2 connectable to the outlet 1 in the electronic apparatus 7, and also including internal circuits 71, 72 respectively containing the PD devices 41, 42 and the receptacles 41R, 42R in the electronic apparatus 7.

Moreover, FIG. 52B shows an example of including a plurality of the receptacles 43R, 44R connected to the outside thereof in one internal circuit 72, in an example of containing the plug 2 connectable to the outlet 1 in the electronic apparatus 7, and also including internal circuits 71, 72 respectively containing the PD devices 41, 42 and the receptacles 41R, 42R in the electronic apparatus 7.

Also in FIGS. 52A and 52B, the receptacles 41R and 42R can be connected to each other by the power line POL and the communication dedicated line COL. Moreover, in FIGS. 52A and 52B, the control input signals of the receptacles 41R and 42R for the PD devices (PD) 41 and 42 can be switched by the secondary-side controller 16.

(Protection Function)

FIG. 53A shows an explanatory diagram of a protection function for the PD device 4 according to the embodiments in a case of using a smartphone 160 as a connecting target, and FIG. 53B shows an explanatory diagram of the protection function for the PD device 4 according to the embodiments in a case of using a laptop PC 140 as a connecting target.

As shown in FIGS. 53A and 53B, the PD device 4 according to the embodiments may include: a primary-side OverPower Protecting circuit (OPP1) (81, 83); and a secondary-side OverPower Protecting circuit (OPP2) (82, 84) connected to the primary-side overpower protecting circuit (OPP1) (81, 83). The primary-side overpower protecting circuit (OPP1) (81, 83) is connected to a primary-side controller (not shown). Moreover, the primary-side overpower protecting circuit (OPP1) (81, 83) may be contained in the primary-side controller. The secondary-side overpower protecting circuit (OPP2) (82, 84) is connected to the secondary-side controller 16.

Moreover, as shown in FIGS. 53A and 53B, the receptacle 41R and the connecting target (e.g., the smartphone 160 and the laptop PC 140) are connected to each other by the power line POL and the communication dedicated line COL. The control input signal of the receptacle 41R for the PD devices (PD) 41 and 42 can be switched by the secondary-side controller 16 connected to the receptacle 41R.

In accordance with target equipment (target sets) connected to the receptacle 41R, electric power information and communication control information in the receptacle 41R are transmitted to the secondary-side overpower protecting circuit (OPP2) (82, 84) from the secondary-side controller 16, and then the secondary-side overpower protecting circuit (OPP2) (82, 84) transmits the aforementioned electric power information and communication control information to the primary-side overpower protecting circuit (OPP1) (81, 83). Consequently, an overcurrent detecting set value can be changed in accordance with the target equipment (target sets) connected to the receptacle 41R, thereby executing power change of the DC/DC converter 13.

Any of the primary-side overpower protecting circuit (OPP1) 81 and the secondary-side overpower protecting circuit (OPP2) 82 may determine whether the electric power information and communication control information in the receptacle 41R exceeds the overcurrent detecting set value.

If it is determined that the electric power information and communication control information in the receptacle 41R exceed the overcurrent (overpower) detecting set value, the primary-side overpower protecting circuit (OPP1) (81, 83) transmits an overcurrent (overpower) protecting control signal to the primary-side controller (not shown), thereby executing the change for controlling the electric power in the DC/DC converter 13.

Various functions, e.g. Over Current Protection (OCP), Over Power Protection (OPP), Over Voltage Protection (OVP), Over Load Protection (OLP), and Thermal Shut Down (TSD), are applicable to the PD device 4 according to the embodiments.

The PD device 4 according to the embodiments includes a sensor (SENSOR) protection function for executing protection corresponding to the characteristics of a certain sensor element connected to the primary-side controller (not shown), for example.

When the overcurrent (overpower) detecting set value is changed in the PD device 4 according to the embodiments, the electric power information and communication control information in the receptacle 41R are transmitted to the primary-side overpower protecting circuit (OPP1) (81, 83) through the secondary-side controller 16 and the secondary-side overpower protecting circuit (OPP2) (82, 84), as mentioned above. Consequently, an overcurrent detecting set value can be changed in accordance with the target equipment (target sets) connected to the receptacle 41R, thereby executing power change of the DC/DC converter 13.

Moreover, when the overcurrent (overpower) detecting set value is changed in the PD device 4 according to the embodiments, the electric power information and communication control information in the receptacle 41R may be directly transmitted to the primary-side overpower protecting circuit (OPP1) (81, 83) from the secondary-side controller 16, thereby directly changing the set value in the primary-side overpower protecting circuit (OPP1) (81, 83).

Moreover, the electric power information may be directly transmitted to the primary-side overpower protecting circuit (OPP1) (81, 83) from the outside of the PD device 4 according to the embodiments.

Thus, according to the PD device 4 according to the embodiments, it is possible to change the PD level in accordance with the target equipment (target sets) connected to the receptacle 41R, in the primary-side overpower protecting circuit (OPP1) (81, 83). Consequently, a destruction of the target equipment (target sets) can be prevented under an abnormal state.

When using a smartphone 160 as a connecting target, with respect to the smartphone 160 (the amount of power 5V·1 A=5 W), if the electric power information and communication control information of 7 W is transmitted to the secondary-side overpower protecting circuit (OPP2) 82 from the secondary-side controller 16, for example, the electric power information and communication control information of 7 W is transmitted to the primary-side overpower protecting circuit (OPP1) 81 from the secondary-side overpower protecting circuit (OPP2) 82, and then the overcurrent (overpower) detecting set value is changed (SW) from 7 W up to 10 W in the primary-side overpower protecting circuit (OPP1) 81. Consequently, the electric power up to 10 W can be transmitted, in the DC/DC converter in the PD device 4 according to the embodiments.

When using a laptop PC 140 as a connecting target, with respect to the laptop PC 140 (the amount of power 20V·3 A=60 W), if the electric power information and communication control information of 80 W is transmitted to the secondary-side overpower protecting circuit (OPP2) 84 from the secondary-side controller 16, for example, the electric power information and communication control information of 80 W is transmitted to the primary-side overpower protecting circuit (OPP1) 83 from the secondary-side overpower protecting circuit (OPP2) 84, and then the overcurrent (overpower) detecting set value is changed (SW) from 80 W up to 100 W in the primary-side overpower protecting circuit (OPP1) 83. Consequently, the electric power up to 100 W can be transmitted, in the DC/DC converter in the PD device 4 according to the embodiments.

(Receptacle/Plug)

As shown in FIG. 54, the PD device 85 according to the embodiments applicable to the AC adapter, the AC charger, the electronic apparatus, and the docking station in which the receptacle is mounted can be connected an outlet having AC power sources 100V-115V, and a plug connected to the power line POL and the communication dedicated line COL can be inserted thereinto. An example of a plug structure is shown in FIG. 27A or 57.

The power line POL can be connected to any of an upper-side power terminal PU and a lower-side power terminal PD of the receptacle, and the communication dedicated line COL can be connected to any of an upper-side communication terminal CU and a lower-side communication terminal CD of the receptacle.

The electric power information can be transmitted through the power line POL, and the communication control information can be transmitted through the communication dedicated line COL. As shown in FIG. 54, The PD device 85 applicable to the AC adapter, the AC charger, and the electronic apparatus in which the PD device according to the embodiments is mounted can be connected to any of the power terminals PU, PD and the communication terminals CU, CD, and there is no need to select the upper or lower side (front or back two surfaces) of the corresponding plug, and therefore convenience in use is effective. In the embodiments, an upper-side power terminal PU and a lower-side power terminal PD of the receptacle respectively correspond to an upper-side VBUS terminal and a lower-side VBUS terminal of the receptacle 41R (42R) shown in FIGS. 24 and 25. Moreover, an upper-side communication terminal CU and a lower-side communication terminal CD of the receptacle respectively correspond to an upper-side communication terminal CC1 (CC2) and a lower-side communication terminal CC1 (CC2) of the receptacle 41R (42R) shown in FIGS. 24 and 25. Note that an illustration of other terminals is omitted, for the purpose of simplified displaying.

Moreover, as shown in FIG. 55, the PD device 86 according to the embodiments applicable to the AC adapter, the AC charger, the electronic apparatus, and the docking station in which the receptacle is mounted can be connected an outlet having AC power sources 230V, and a plug connected to the power line POL and the communication dedicated line COL can be inserted thereinto. An example of a plug structure is shown in FIG. 27A or 57.

Moreover, as shown in FIG. 56, the PD device 87 according to the embodiments applicable to the AC adapter, the AC charger, and the electronic apparatus in which the receptacle is mounted can be connected an outlet having AC power sources 100V-115V, and a plurality of plugs connected to the power line POL and the communication dedicated line COL can be inserted thereinto. An example of a plug structure is shown in FIG. 27A or 57.

One or a plurality of secondary-side controllers can be contained in the AC adapter, the AC charger, the electronic apparatus, and the docking station. By such a signal conversion circuit and switching operation executed by the secondary-side controllers, the number of extraction of the outputs of the PD devices 85, 86, and 87 can be variously selected. For example, it is possible to set a ratio of the number of extraction as 1:N, 1:1, or N:1, where N is an integer greater than or equal to 2. Moreover, it is also possible to use in conjunction with the USB PD receptacle.

Moreover, as shown in FIG. 57, the PD device 88 according to the embodiments applicable to the AC adapter, the AC charger, and the electronic apparatus in which the plug 2 is mounted can be connected an outlet having AC power sources 100V-115V, and an outlet having AC power sources 230V. The plug 2 is synonymous with configurations shown in FIGS. 45A and 45B, 46B, 47A and 47C, 48A and 48C, 49A and 49C, and 50A and 50C. Moreover, the plug 2 may be applicable also to the USB PD.

(A Plurality of Connecting Targets)

FIG. 58 shows a schematic circuit block configuration of the PD device according to the embodiments connected to a plurality of connecting targets through a plurality of the receptacles. In FIG. 58, the secondary-side controller 16 is connected to a smartphone 160, a laptop PC 140, and a tablet PC 150 which are connecting targets respectively through the receptacles 41R1, 41R2, and 41R3. The power line POL and the communication dedicated line COL are connected to between the receptacles 41R1, 41R2, and 41R3 and the smartphone 160, the laptop PC 140, and the tablet PC 150. The power line POL is controlled to be switched by a switch SW_(c) controllable by the secondary-side controller 16, and is connected to the power line output (VBUS). A control input signal from the smartphone 160, the laptop PC 140, and the tablet PC 150 to the PD device 4, and a control output signal from the PD device according to the embodiments to the smartphone 160, the laptop PC 140, and the tablet PC 150 can be transmitted on the communication dedicated line COL.

FIG. 59 shows a schematic bird's-eye view structure example of the PD device 89 according to the embodiments applicable to the AC adapter, the AC charger, the electronic apparatus, and the docking station in which a plurality of receptacles 41R1, 41R2, 41R3, and 41R4 are mounted. In an example of FIG. 59, four receptacles 41R1, 41R2, 41R3, and 41R4 can be connected thereto, and can be manually switched by a switch 89S. The receptacles 41R1, 41R2, and 41R3 shown in FIG. 58 respectively correspond to the receptacles 41R1, 41R2, and 41R3 shown in FIG. 59. Moreover, although the example of providing four pieces of the receptacles 41R1, 41R2, 41R3, and 41R4 is shown in FIG. 59, it is also adaptable to an arbitrary number of pieces, e.g. two pieces, or six pieces, of the receptacles.

(USB PD Communications)

FIG. 60 shows a schematic circuit block configuration for explaining an example of using control input output signals for a USB PB communications between a plurality of the PD devices according to the embodiments.

In the first PD device, as shown in FIG. 60, the secondary-side controller 16 ₁ is connected to the control terminal CT1 through the coupling capacitor C_(c). An Illustration of other configurations are omitted.

In the second PD device, as shown in FIG. 60, the secondary-side controller 16 ₂ is connected to the control terminal CT2 through the coupling capacitor C_(c). An Illustration of other configurations are omitted. In addition, the secondary-side controllers 16 ₁ and 16 ₂ may be respectively connected to the control terminals CT1 and CT2 through the AC coupling capacitors. Moreover, an output capacitor C_(o) is connected between the power line POL (VBUS output) and the secondary-side controllers 16 ₁ and 16 ₂ (illustration is omitted).

In the USB PD communications, the control terminals CT1 and CT2 are connected to each other by the power line POL.

(PD System)

In the PD system to which the PD device according to the embodiments can be applied, a source of electric power can be switched without changing a direction of the cable. For example, electric charging of a battery in a laptop PC from external devices and power transmission from a battery or an internal PD device in the laptop PC to external devices (e.g., display etc.) can be achieved without replacement of the cable.

Moreover, power transmission and half-duplex data communications can be realized between two units through the power line POL and the communication dedicated line COL.

In the PD system to which the PD device according to the embodiments can be applied, DC power delivery (DC PD) (DC output VBUS) and data communications can be transmitted between the battery charger system and the laptop PC by using the power line POL and the communication dedicated line COL. In this context, the PD device according to the embodiments is mounted in the battery charger system and the laptop PC.

In the PD system to which the PD device according to the embodiments can be applied, the DC power delivery (DC output VBUS) and the data communications can be transmitted by using the power line POL and the communication dedicated line COL, between the smartphone and the laptop PC. In this context, the PD device according to the embodiments is mounted in the smartphone and the laptop PC.

FIG. 61 shows a schematic block configuration for explaining the data communications and the electric power supply between two personal computers (PCs) PCA and PCB, in the PD system to which the PD device according to the embodiments can be applied. In FIG. 61, illustration of the DC/DC converters are omitted, but the secondary-side controllers 16A and 16B, are shown. The PD devices according to the embodiments are respectively mounted in the personal computers (PCs) PCA and PCB.

Moreover, an output capacitor C_(o) is connected between the power line POL (VBUS output) and the secondary-side controllers 16A and 16B (illustration is omitted).

The personal computers (PC) PCA and PCB are connected to each other through the power line POL and the communication dedicated line COL. The communication dedicated line COL is connected between the control terminals CT1 and CT2.

As shown in FIG. 61, the control terminal CT1 is connected to the controller 16A through the secondary-side controller 16A, and the control terminal CT2 is connected to the controller 16B through the secondary-side controller 16B. The secondary-side controllers 16A, 16B and the control terminals CT1, CT2 may be respectively connected each other through the AC coupling capacitors. Moreover, a battery E and a battery charger IC (CHG) 53 connected to the battery E is mounted in the personal computer (PC) PCA, and a Power Management IC (PMIC) 54 is mounted in the personal computer (PC) PCB.

In the PD system to which the PD device according to the embodiments can be applied, electric charging of the battery E from the personal computer PCB to the personal computer PCA, and power transmission of the battery E from the personal computer PCA to the personal computer PCB can achieved without replacement of any cable, for example.

Moreover, the secondary-side controllers 16A, 16B are respectively connected to the communication dedicated lines COL, thereby realizing half-duplex data communications between the personal computers (PCs) PCA, PCB. In the present embodiment, the carrier frequency is approximately 23.2 MHz, for example, and the FSK modulation/demodulation frequency is approximately 300 kbps, for example. In the present embodiment, the Bit Error Rate (BER) is approximately 1×10⁻⁶, and an LSI for built-in self tests (BIST) may be included therein, for example.

FIG. 62A shows a schematic block configuration for explaining the data communications and the electric power supply between two units 56 and 58, in the PD system to which the PD device according to the embodiments can be applied.

The two units 56 and 58 are connected to each other by the power line POL and the communication dedicated line COL. The power line POL and the communication dedicated line COL is plug-connected to the receptacles 41R and 42R contained in the two units 56 and 58.

The two units 56 and 58 are arbitrary electronic apparatuses in which the PD devices according to the embodiments are respectively mounted. In FIG. 62A, illustration of the DC/DC converters are omitted, but the secondary-side controllers 16A and 16B, are shown. Moreover, an output capacitor C_(o) is connected between the power line POL (VBUS output) and the secondary-side controllers 16A and 16B (illustration is omitted).

FIG. 62B shows a schematic block configuration of a PD system including an AC adapter/AC charger 3 and a smartphone 160 each which contains the PD device according to the embodiments.

The AC adapter/AC charger 3 and the smartphone 160 are connected to each other by the power line POL and the communication dedicated line COL. The power line POL and the communication dedicated line COL are plug-connected to the receptacles 41R and 42R respectively contained in the AC adapter 3 and the smartphone 160.

The PD devices according to the embodiments are respectively mounted in the AC adapter/AC charger 3 and the smartphone 160. In FIG. 62B, illustration of the DC/DC converters are omitted, but the secondary-side controllers 16A and 16B, are shown.

The AC adapter/AC charger 3 includes the AC/DC converter 60, and the secondary-side controller 16A. The smartphone 160 includes the secondary-side controller 16B, an embedded type controller (EMBC) 64, a CPU 68, a PMIC 54, a battery 66, and a battery charger IC (CHG) 62. Moreover, an output capacitor C_(o) is connected between the power line POL (VBUS output) and the secondary-side controllers 16A and 16B (illustration is omitted). Moreover, the AC coupling capacitors may be respectively provided between the secondary-side controllers 16A and 16B and the receptacles 41R, 42R.

In the PD system to which the PD device according to the embodiments can be applied, electric charging of the battery 66 in the smartphone 160 from the AC adapter/AC charger 3, and power transmission to the external device from the battery 66 in the smartphone 160 can be achieved without replacement of the cable, for example.

FIG. 63 shows a schematic block configuration of a PD system including two units 56 and 58 each containing the PD device according to the embodiments.

The two units 56 and 58 are connected to each other by the power line POL and the communication dedicated line COL. The power line POL and the communication dedicated line COL is plug-connected to the receptacles 41R and 42R contained in the two units 56 and 58.

The PD devices according to the embodiments are respectively mounted in the two units 56 and 58. In FIG. 63, illustration of the DC/DC converters are omitted, but the secondary-side controllers 16A and 16B, are shown. Moreover, an output capacitor C_(o) is connected between the power line POL (VBUS output) and the secondary-side controllers 16A and 16B (illustration is omitted).

The unit 56 includes the AC/DC converter 60 and the secondary-side controller 16A, and the unit 58 includes the secondary-side controller 16B and a load 70. In the present embodiment, the load 70 can be composed of a CPU, a battery BAT, a controller CTR, etc. Moreover, the AC coupling capacitors may be respectively provided between the secondary-side controllers 16A and 16B and the receptacles 41R, 42R.

In the PD system to which the PD device according to the embodiments can be applied, power transmission from the unit 56 to the unit 58, and power transmission to external devices from the unit 58 can be achieved without replacement of the cable, for example.

Moreover, the secondary-side controllers 16A, 16B are respectively connected to the communication dedicated lines COL, thereby realizing half-duplex data communications between the units 56, 58.

In the PD system to which the PD device according to the embodiments can be applied, FIG. 64 shows a schematic block configuration composed of two units 56 and 58 different from the configuration shown in FIG. 63.

The unit 56 includes a battery E, a CPU 68A and the secondary-side controller 16A, and the unit 58 includes a CPU 68B, the secondary-side controller 16B, and a load CL.

The two units 56 and 58 are connected to each other by the power line POL and the communication dedicated line COL. The power line POL and the communication dedicated line COL is plug-connected to the receptacles 41R and 42R (not shown) contained in the two units 56 and 58. The power line POL is connected between the battery E and the load CL, and the communication dedicated line COL is connected between the secondary-side controllers 16A and 16B. Moreover, an output capacitor C_(o) is connected between the power line POL (VBUS output) and the secondary-side controllers 16A and 16B (illustration is omitted). Moreover, the AC coupling capacitors may be respectively provided between the secondary-side controllers 16A and 16B and the communication dedicated line COL.

In the PD system to which the PD device according to the embodiments can be applied, power transmission from the unit 58 to the unit 56, and power transmission to the unit 58 from the battery E can be achieved without replacement of the cable, for example. Moreover, the half-duplex data communications, for example, can be realized between the units 56 and 58.

As shown in FIG. 65, a first PD system 100 to which the PD device according to the embodiments can be globally applied includes: a monitor 110 connected to an outlet through a plug; and an external hard disk drive 120, a set top box 180, a laptop PC 140, a tablet PC 150, and a smartphone 160 each connected to the monitor 110 using the USB PD cable. In this context, otherwise, the monitors 110 may be TV or a docking station.

Although the PD device 4 according to the embodiments is mounted in each configuring elements, illustration of the DC/DC converter is omitted, but the secondary-side controller 16 is illustrated in FIG. 65. Moreover, an output capacitor C_(o) is connected between the power line POL (VBUS output) and the secondary-side controller 16 (illustration is omitted). Moreover, the AC coupling capacitor may be applied to the communication dedicated line COL. Moreover, when applying the USB PD, a USB PD controller may be applied to the controller 16.

Power transmission and communications data transmission can be executed using the power line POL and the communication dedicated line COL, between the monitor 110, and the external hard disk drive 120, the set top box 180, the laptop PC 140, the tablet PC 150 and the smartphone 160. The power line POL is illustrated with the thick solid line, and the communication dedicated line COL is illustrated with the dashed line. When applying the USB PD, the power line POL may be used therefor, instead of the communication dedicated line COL illustrated with the dashed line. Moreover, the communication dedicated line COL is connected to the secondary-side controller 16 through the AC coupling capacitor (not shown). Alternatively, the communication dedicated line COL may be directly connected to the secondary-side controller 16, without through the AC coupling capacitor.

Portions illustrated with the circular dashed-line illustrate that the cable used for the power line POL and the cable used for communication dedicated line COL are separated. A USB PD cable can be applied to the cable for the power line POL, and a communication dedicated cable (COM) can be applied to the cable for the communication dedicated line COL. Moreover, an internal cable for changing between the power line POL and the communication dedicated line COL may be used therefor.

The AC/DC converter 60 and the secondary-side controller 16 are mounted in the monitor 110. A CPU+interface board 122, and the secondary-side controller 16 are mounted in the external hard disk drive 120. A CPU+interface board 132 and the secondary-side controller 16 are mounted in the set top box 180. A Narrow Voltage DC/DC (NVDC) charger 142, a CPU148, a Platform Controller Hub (PCH) 147, an Embedded Controller (EC) 146, and the secondary-side controller 16 are mounted in the laptop PC 140. An Application CPU (ACPU) 156, a battery charger IC (CHG) 158, a battery 157, and the secondary-side controller 16 are mounted in the tablet PC 150. An Application CPU (ACPU) 166, a USB charger 162, a battery 172, and the secondary-side controller 16 are mounted in a smartphone 160.

As shown in FIG. 66, a second PD system 200 to which the PD device according to the embodiments can be globally applied includes: a USB PD adapter 230 connected to an outlet through a plug; a laptop PC 140 connected to the USB PD adapter 230; and an external hard disk drive 120, a monitor 110, a tablet PC 150, and a smartphone 160 connected to the laptop PC 140. In this context, otherwise, the laptop PC 140 may be a docking station.

Although the PD device 4 according to the embodiments is mounted in each configuring elements, illustration of the DC/DC converter is omitted, but the secondary-side controller 16 is illustrated in FIG. 66. Moreover, an output capacitor C_(o) is connected between the power line POL (VBUS output) and the secondary-side controller 16 (illustration is omitted). Moreover, the AC coupling capacitor may be applied to the communication dedicated line COL. Moreover, when applying the USB PD, a USB PD controller may be applied to the secondary-side controller 16.

Power transmission and communications data transmission can be executed using the power line POL and the communication dedicated line COL, between the laptop PC 140, and the USB PD adapter 230, the external hard disk drive 120, the monitor 110, the tablet PC 150 and the smartphone 160.

The AC/DC converter 60 and the secondary-side controller 16 are mounted in the USB PD adapter 230. An NVDC charger 142, a CPU 148, a PCH 147, an EC 146, a battery 154, a DC/DC converter 159, and the secondary-side controller 16 ₁ and 16 ₂ are mounted in the laptop PC 140. PMIC 112 and the secondary-side controller 16 are mounted in the monitor 110. Other configurations are the same as that of the first PD system 100 (FIG. 65).

As shown in FIG. 67, a third PD system 300 to which the PD device according to the embodiments can be globally applied includes: a USB PD adapter/charger 310 connected to an outlet through a plug; and an external hard disk drive 120, a monitor 110, a set top box 180, a laptop PC 140, a tablet PC 150, and a smartphone 160 each connected to the USB PD adapter/charger 310.

Although the PD device 4 according to the embodiments is mounted in each configuring elements, illustration of the DC/DC converter is omitted, but the secondary-side controller 16 is illustrated in FIG. 67. Moreover, an output capacitor C_(o) is connected between the power line POL (VBUS output) and the secondary-side controller 16 (illustration is omitted). Moreover, the AC coupling capacitor may be applied to the communication dedicated line COL. Moreover, when applying the USB PD, a USB PD controller may be applied to the secondary-side controller 16.

Power transmission and communications data transmission can be executed using the power line POL and the communication dedicated line COL, between the USB PD adapter/charger 310, and the external hard disk drive 120, the monitor 110, the set top box 180, the laptop PC 140, the tablet PC 150 and the smartphone 160.

The AC/DC converter 60 and the secondary-side controller 16 are mounted in the USB PD adapter/charger 310. Other configurations are the same as those of the first PD system 100 (FIG. 65) and the second PD system 200 (FIG. 66).

As shown in FIG. 68, a fourth PD system 400 to which the PD device according to the embodiments can be globally applied includes: a high-performance USB PD adapter/charger 330 connected to an outlet through a plug; and an external hard disk drive 120, a monitor 110, a set top box 180, a laptop PC 140, a tablet PC 150, and a smartphone 160 each connected to the high-performance USB PD adapter/charger 330.

Although the PD device 4 according to the embodiments is mounted in each configuring elements, illustration of the DC/DC converter is omitted, but the secondary-side controller 16 is illustrated in FIG. 68. Moreover, an output capacitor C_(o) is connected between the power line POL (VBUS output) and the secondary-side controller 16 (illustration is omitted). Moreover, the AC coupling capacitor may be applied to the communication dedicated line COL. Moreover, when applying the USB PD, a USB PD controller may be applied to the secondary-side controller 16.

Power transmission and communications data transmission can be executed using the power line POL and the communication dedicated line COL, between the high-performance USB PD adapter/charger 330, and the external hard disk drive 120, the monitor 110, the set top box 180, the laptop PC 140, the tablet PC 150 and the smartphone 160.

The AC/DC converter 60A including a synchronous FET switching converter, and the secondary-side controller 16 are mounted in the high-performance USB PD adapter/charger 330. Other configurations are the same as that of the third PD system 300 (FIG. 67).

FIG. 69 shows a schematic block configuration having a configuration in which the controller 16 is contained in a CPU+interface board 122 (132), in the PD system to which the PD device according to the embodiments can be applied. More specifically, in the PD systems 100 to 400 respectively shown in FIGS. 65 to 68, the controller 16 may be contained in a CPU+interface board 122 (132). In this case, the power line POL and the communication dedicated line COL are used for the CPU+interface board 122, and thereby electric power and communications data can be transmitted. A chip in which the controller 16 is contained in such a CPU+interface board 122 (132) can also be configured as an integrated chip with a CPU including a controller, a DSP, and another controller.

As explained above, according to the embodiments, there can be provided the PD device, the AC adapter, the AC charger, the electronic apparatus, and the PD system, each capable of switching with respect to the plurality of the apparatuses, and each capable of controlling the output voltage value and the available output current value (MAX value).

Other Embodiments

As explained above, the embodiments have been described, as a disclosure including associated description and drawings to be construed as illustrative, not restrictive. This disclosure makes clear a variety of alternative embodiments, working examples, and operational techniques for those skilled in the art.

Such being the case, the embodiments cover a variety of embodiments and the like, whether described or not.

INDUSTRIAL APPLICABILITY

The PD device, the AC adapter, the electronic apparatus, and the PD system according to the embodiments are applicable to electrical household appliances and electrical equipment, mobile computing devices, etc. 

What is claimed is:
 1. A power delivery device comprising: a DC/DC converter disposed between an input and a VBUS output; a primary-side controller configured to control an input current of the DC/DC converter; and a secondary-side controller coupled to a plurality of control inputs, the secondary-side controller configured to executed a signal conversion of control input signals of the plurality of the control inputs, and configured to feed back the control input signals subjected to the signal conversion to the primary-side controller, wherein the primary-side controller varies an output voltage value and an available output current value of the DC/DC converter by controlling the input current on the basis of the control input signal fed back from the secondary-side controller, wherein the secondary-side controller comprises a first communication circuit and a second communication circuit, wherein the first communication circuit comprises a protocol conversion unit configured to execute a frequency conversion, and the second communication circuit comprises a communication circuit disposed between the protocol conversion unit and the control input, the communication circuit configured to execute a code conversion.
 2. The power delivery device according to claim 1, further comprising: an output capacitor configured to couple the secondary-side controller and the VBUS output to each other.
 3. The power delivery device according to claim 1, further comprising: an AC coupling capacitor configured to couple the secondary-side controller and the control input to each other.
 4. The power delivery device according to claim 1, wherein the secondary-side controller can further execute a signal conversion of an AC signal component of the VBUS output.
 5. The power delivery device according to claim 1, wherein the secondary-side controller is coupled to a plurality of control inputs, and can execute signal conversion and switching of the control input signals of the plurality of the control inputs.
 6. The power delivery device according to claim 1, further comprising: a power output circuit connected to the primary-side controller, the power output circuit configured to supply output voltages to a plurality of VBUS outputs disposed in pairs with the plurality of the control inputs.
 7. The power delivery device according to claim 6, wherein the power output circuit comprises a plurality of DC/DC converters.
 8. An AC adapter comprising the power delivery device according to claim
 1. 9. An AC charger comprising the power delivery device according to claim
 1. 10. An electronic apparatus comprising the power delivery device according to claim
 1. 11. A power delivery device comprising: a DC/DC converter disposed between an input and a VBUS output; a primary-side controller configured to control an input current of the DC/DC converter; a secondary-side controller coupled to a control input, the secondary-side controller configured to executed a signal conversion of a control input signal of the control input, and configured to feed back the control input signal subjected to the signal conversion to the primary-side controller; and an output capacitor configured to couple the secondary-side controller and the VBUS output to each other, wherein the primary-side controller varies an output voltage value and an available output current value of the DC/DC converter by controlling the input current on the basis of the control input signal fed back from the secondary-side controller, wherein the secondary-side controller comprises a first communication circuit and a second communication circuit, wherein the first communication circuit comprises a protocol conversion unit configured to execute a frequency conversion, and the second communication circuit comprises a communication circuit disposed between the protocol conversion unit and the control input, the communication circuit configured to execute a code conversion.
 12. The power delivery device according to claim 11, wherein the output capacitor is connected between the first communication circuit and the VBUS output.
 13. The power delivery device according to claim 11, wherein the secondary-side controller comprises a switch configured to selects between the output capacitor and the control input.
 14. The power delivery device according to claim 11, wherein the secondary-side controller comprises: a first transceiver connected to the output capacitor; and a switch controlled by the secondary-side controller, the switch configured to select between the first transceiver and the control input.
 15. The power delivery device according to claim 11, wherein: the secondary-side controller comprises a first transceiver configured to selects between the output capacitor and the control input.
 16. The power delivery device according to claim 11, wherein the secondary-side controller comprises: a first transceiver connected to the output capacitor; a second transceiver connected to the control input; and a switch configured to select between the first transceiver and the second transceiver.
 17. The power delivery device according to claim 11, wherein the secondary-side controller comprises: a first transceiver connected to the output capacitor; a plurality of second transceivers respectively connected to a plurality of the control inputs; and a switch configured to select between the first transceiver and the plurality of the second transceivers.
 18. A power delivery system comprising a power delivery device, the power delivery device comprising: a DC/DC converter disposed between an input and a VBUS output; a primary-side controller configured to control an input current of the DC/DC converter; and a secondary-side controller coupled to a plurality of control inputs, the secondary-side controller configured to executed a signal conversion of control input signals of the plurality of the control inputs, and configured to feed back the control input signals subjected to the signal conversion to the primary-side controller 30, wherein the primary-side controller varies an output voltage value and an available output current value of the DC/DC converter by controlling the input current on the basis of the control input signal fed back from the secondary-side controller, wherein the secondary-side controller comprises a first communication circuit and a second communication circuit, wherein the first communication circuit comprises a protocol conversion unit configured to execute a frequency conversion, and the second communication circuit comprises a communication circuit disposed between the protocol conversion unit and the control input, the communication circuit configured to execute a code conversion. 